Tachycardia, Arrhythmia

Last updated: May 16, 2014

This post summarizes my experiences with episodes of tachycardia and accompanying arrhythmia. My earlier posts, which partly were journals of events as they happened, were:
(1) March 30, 2011: http://www.anti-itisdiet.blogspot.com/2011/03/metoprolol.html
(2) January 25, 2011: http://www.anti-itisdiet.blogspot.com/2011/01/my-atrial-fibrillationflutter-adventure.html

EPISODES. Through the last twenty years, I have had five episodes of tachycardia (rapid heart rate). 

EPISODE 1. The first episode, in Portland, Oregon occurred around twenty years ago, after Christmas day, about thirty minutes after an extraordinarily large evening meal. I was out walking and bent over to retie my shoe laces. Emergency medical people said my rate was about 175 beats per minute (bpm). In an emergency room of a hospital, a doctor injected a substance (unknown to me now) that stopped the racing and restored my normal rate of about 65 bpm.

EPISODE 2. The second episode occurred about five years ago, in Auburn, Washington, shortly before Christmas day, about thirty minutes after a very large evening meal, while I was cleaning my kitchen. An emergency room doctor tried but failed to stop the racing heart by injecting a substance through a tube. Doctors there persuaded me to stay in the hospital to test the functions of my kidneys, liver, thyroid, and pancreas. All were operating normally. The doctors also checked my lungs for an embolism and found none. Likewise, a CAT scan revealed no brain tumors or other problems. Finally after three days of testing, the doctors said "cause unknown" for the racing heart and slight arrhythmia (either atrial fibrillation or flutter, but the diagnosis was not clear). About three months later, I underwent electrical cardioversion, a shock to the heart, and it succeeded in returning my rate to normal and without arrhythmia.

EPISODE 3. A year after the e-cardioversion success my heart rate again went into tachycardia. This was my third episode; it occurred in Shelton, Washington. This episode happened in early March while I was sleeping—after a very large evening meal. The emergency room doctor was unable to stop it. They released me (at 2 am) to return home. My rate was about 135 bpm. This episode ended after about six months of medication (described below) designed to lower the heart rate.

EPISODE 4. A fourth episode occurred, also in Shelton, about a year later, again in March (2013) and again in the evening after a large meal eaten hurriedly and without adequate chewing. This episode ended after about nine months of medication—and three months of taking Vitamin D3 (1000 IU three times weekly).

EPISODE 5. My fifth episode began on April 29, 2014, after about four months of no tachycardia or irregularity (December 2013 to April 2014). The event started in the evening. The immediate trigger was eating a meal too quickly. I bloated. Then after dinner I bent over to untie my shoe laces. My heart began racing. I could not stop it with deep breathing and back bends. Compression of the heart seems to have been the cause. I began taking 50 mg Metoprolol and 0.25 mg Digoxin. In the following two weeks I went through the familiar stages: (1) At first the medications seem to have little effect; (2) after a few days the heart rate dropped into the 80s; (3) on May 11 (much sooner than in earlier episodes), my heart rate dropped into the 40s-50s. I needed to cut back my walking and walk more slowly too. I reduced my digoxin to 0.125 mg, and then after a few days, deleted it as my heart rate continued to be in the 40s. This episode has shown faster recovery than ever before.

SUMMARY. There is a general pattern: onset in the dark months of December through April; often in the evening after hastily eating a large meal; often following compression by bending over, though twice the racing heart rate began in my sleep.

MEDICATIONS. In the first episode, the ER physician released me from the ER without prescribing any medications. In the second episode, while I was in the hospital for the long series of tests, the physician prescribed 100 mg of Metoprolol, taken daily, which is the standard dosage. (The range of dosage is now about 25 to 400 mg/day.) I said I preferred to start at the bottom of the range and work up if that amount was insufficient. (The purpose of Metoprolol is mainly to reduce the heart rate, although it also lowers blood pressure.) The doctor insisted on 100 mg that first day. That night, the hospital monitors sent an alarm to the head nurse because my heart rate down into the low thirties. The nurse said I might be a hyperresponder.) The doctor adjusted the dosage to 50 mg. That brought my heart rate down to the mid forties in the following night, but no lower. (Normally, without medication, the heart rate is lowest in the deepest part of sleep, typically about four or five in the morning.)

After leaving the hospital in the second episode, I began working with a non-interventionist cardiologist, Dr. VK. After long discussion, he recommended that I try the first step in the staircase of treatments available: electrical cardioversion. Preparation for that treatment was long: about 10 weeks of treatment with a variety of drugs designed to shape my heart's action. Dr. VK said my arrhythmia was difficult to diagnose. He was not sure whether it was atrial flutter or atrial fibrillation. After a treadmill and other tests, he decided on atrial fibrillation.

During this period of preparing for e-conversion, I took Pradaxa (an expensive, strong anti-coagulant), which I used reluctantly, Multaq (apparently designed to "shape" the rhythm of the heart beat), and Metoprolol (50 mg, time release). I took the Metoprolol at breakfast and the other pills at lunch and dinner. 

The time release version of Metoprolol, which is more expensive, is supposed to have a steady effect of lowering the heart rate throughout the day but loses its strength somewhat very late at night when the heart rate is normally lower already. Even the low dosage of 50 mg made me very sleepy after breakfast for about two hours. (Fortunately I am retired and do not need to drive, which would have been dangerous.) Another result for about one month was intestinal upset (gas, loose stools), but this diminished with time. I suspect that the Multaq (prescribed for only a month or so as preparation for e-conversion) and the Pradaxa also contributed to the upset.

After the successful e-conversion, ending my second episode of tachycardia, I took 50 mg of Metoprolol and an 81 mg aspirin daily. (The aspirin, like the Pradaxa, is designed to reduce the chance of a blood clot forming in the heart, when the heart is not operating properly; the clot can be expelled from the heart and into an artery, thus blocking the artery and causing a stroke.)

After the onset of my third episode, I again took 50 mg of Metoprolol. I had much less intestinal upset, and even that diminished within two weeks or so. The gut does seem to become accustomed to the Metoprolol.After my fourth episode has ended, I continued to take 50 mg of Metoprolol. I also continued to take Digoxin. One of my physicians recommended it as a way of addressing the slight atrial flutter that accompanied the fourth episode of tachycardia. 

The prescription for Digoxin for my fourth episode was for 0.25 mg. I started by taking it at dinner. (I always take these heart tablets in the middle of meals unless the doctor says otherwise.) It seemed to make me jumpy. Going to sleep in the evening was difficult, which was unusual for me. I switched to taking the Digoxin at lunch, and that ended the jumpiness and sleeplessness.

After about two months of taking 0.25 mg of Digoxin (an extract from Foxglove, the drug that painter Vincent Van Gogh was taking when he cut his ear off with a razor), I began having vision problems: bright lights seemed to flicker. I also felt a little disoriented and I was not able to walk straight. I cut the Digoxin tablets in half, and the problems went away. (Any pill that has a "score" down the middle can be cut in half.)

My cardiologist for my second episode, Dr. VK, convinced me that even if the tachycardia disappeared, I should continue taking the Metoprolol for the remainder of my life, as a way of reducing the chance of the problem returning. That is why now, after my fourth episode has ended (lasting six months), I continue to take it. For the moment, I will also continue the 0.125 mg of Digoxin. I may wean away from it in a month or so and judge the effect.

JOURNAL OF READINGS. I measure and record my heart rate and blood pressure at least once daily, usually about 30 minutes after breakfast. Meals make the rate go up. The lead up to a bowel movement makes the heart rate go up. Of course any other physical or emotional event (such as reading the news) can elevate the heart rate and blood pressure. 

USUAL CAUSES. According to what I have read and have been told by physicians, the usual trigger for tachycardia is one or more of these: surgery (and the anesthesia); overweight; severe long-term stress; liver problems; kidney problems; brain tumors; embolisms in the lung; alcohol; stimulants (such as strong coffee); thyroid problems. Most victims of tachycardia are old, overweight, and damaged through an unhealthy lifestyle. However, some victims of tachycardia are young athletes—such as basketball players and runners—who subject their heart to long-term physical stress.

I am old (70), but my first episode occurred 18 years ago. I have been lean or very lean (now Body Mass Index of 18) for most of my adult life. I have frequently pushed myself physically (running up the steepest hills for the challenge of it, for example), and pushing myself to work very long hours without adequate relaxation. I still do not know the long-term cause of my tachycardia episodes, but I suspect that the physical pressure of eating too much volume was probably the direct trigger in each case.

BEHAVIORAL CHANGES. Why did my fourth episode of tachycardia stop by itself? Why was my fifth episode so short and stopped by itself? Possible causes are:

(1) Curative effect of taking Vitamin D3 for several months. I was taking a standard, low dose of 1000 IU three times weekly. This seems to me, a layman, to be the most likely cure. Inadequate Vitamin D intake was the most likely cause of the tachcardia: All four onsets began in the December to March period of the years, the time when my Vitamin D level would be lowest. On my diet, I take in no Vitamin D from food (no fish, for example) and I live in rain-forest country, where, even walking outside two hours daily, I receive little sunshine from September to May.

(2) A cumulating effect of the medications. Does the Metoprolol "train" the nerve to fire at a slower rate? I do not know.

(3) Stopping  "pushing" myself when I walk; I now still walk up steep hills, but I do so slowly, without accelerating my heart rate much. I continue to walk two hours daily, but I cover less distance.

(4) Avoiding stressful situations such as reading the news. I can do nothing about the events featured in the news. They make me angry or sad, but I have no way to correct them. Now, when eating, I read a novel instead of reading the news stream of mostly terrible events.

(5) Monitoring myself: Am I physically and mentally relaxed? Am I focused on one task? Being relaxed does not mean being unproductive or working less.

(6) Stretching more, especially before sleeping.

(7) Resting more. A short nap can reduce my heart rate by 20 bpm.

(8) Avoiding all stimulants, but still drinking sufficient liquid. I avoid coffee, black tea, green tea, and even herbal teas that might stimulate the heart rate. The only teas I drink at the moment are Lemon Balm and Mint and occasionally "Nighty Night," a mixture designed to encourage relaxation and sleep. By drinking one cup of herbal tea or water (with or without a squeeze of lemon) after each meal, I consume plenty of liquid. Plus, most of my meals are either potato stew or steamed rice (which absorbs a lot of water in cooking).

(8) Being objective, by which I mean focusing on objects directly in front of and not worrying about real or imaginary events occurring outside of my life. This focusing includes engaging in one task at a time and not multitasking. Often slower is faster.

(9) Chewing my food thoroughly and eating slowly, without stress.

Burgess Laughlin

Author of The Power and the Glory: The Key Ideas and Crusading Lives of Eight Debaters of Reason vs. Faith, described here

P.S. If you have successfully stopped your own tachycardia episodes, please comment below.

My atrial fibrillation adventure

(This post is a diary. For a summary and overview of my tachycardia and arrhythmia experiences see the October 13, 2013 post here: http://www.anti-itisdiet.blogspot.com/2013/10/tachycardia-arrhythmia.html)

This post is my "journal" for my most recent medical adventure, chronic atrial fibrillation. I will revise the post as events unfold. I am not asking for specific medical advice. I welcome any suggestions for topics that I should consider or reconsider.

CHRONOLOGY

1997: EPISODE OF AFIB. After a large dinner, I walked, stopped, bent over to retie my shoe laces -- and my heart began beating irregularly and about 170 beats per minute (as I heard later from the emergency medical technicians who examined me). A doctor in the emergency room administered a chemical intravenously. It restored the regular rate. I walked home from the hospital.

2010, Dec. 19-23: CHRONIC AFIB. After a large dinner, I experience a rapid, strong, and irregular heart rate. It continued that way, with some variation, for four days. (I have learned to avoid rushing into medical treatments.) At the end of that period, I called 911 because I was worried about the rate. The emergency technicians said it was spiking at about 170 beats per minute.

Chronic atrial fibrillation, in some forms, is dangerous long-term because of the possibility of (1) eventual deterioration of the heart muscles, and (2) stroke resulting from a blood clot forming in the atrium, being expelled into an artery, and then blocking an artery somewhere in the body. Besides the danger, "afib" is very uncomfortable in some forms and very distracting. (My productivity for any kind of intellectual work plunged.)

2010, Dec. 23-25: ER AND HOSPITALIZATION. I went to a local hospital's emergency room. The doctor in charge administered, through an intravenous tube, a drug designed to regulate the heart rate. It did not work. The medication did improve the beat regularity somewhat and did lower the rate to about 130 BPM. (A safe rate is less than 90 and an ideal rate is about 60 BPM.)

I was admitted to the hospital from the ER. I had tests of my heart (electrocardiogram and echocardiogram [ultrasound]), thyroid (no problem), lungs (CAT scan, no embolism), "heart protein" (meaning unclear, but no problem), blood (no problem with either fat levels or vitamin or mineral deficiencies). I also had no kidney or liver or other organ problems. (That was good news I attribute to my diet.) No one asked me about what I eat except that the hospital dietician asked if there are foods to which I am allergic.

Struggling against the standard hospital over-treatment, I rejected some of the drugs which hospitals automatically prescribe for every heart patient: stool softener (I eat a high-fiber diet!), antacid (I have had no acid reflux since adopting my "anti-itis" diet six years ago), pain reliever (I have had no chest pain), two of the three anticoagulants (I accepted only an aspirin daily). I did accept Metoprolol (which suppresses the rapid heart rate to a safe level) in the lowest dosage (12.5 mg, 2x daily). The official diagnosis was atrial fibrillation, with no identified cause. I was discharged on Dec. 25 with instructions to take Coumadin (Warfarin, an anticoagulant designed to reduce the chance of a blod clot forming in the atria).

2010, Dec. 26 - 2011, Jan. 1st week: OUT OF THE HOSPITAL: PHARMACEUTICALS. For about five days, I experienced oscillating mild chill and fever, but it faded away. I researched online for the nature and effects of Coumadin (Warfarin). I decided not to take it.

I was examined briefly by my new primary care physician, Dr. C, and he gave me a short list of local cardiologists. I found Dr. K, a non-intervention specialist. He prescribed a higher dose of Metoprolol, a beta-blocker, 35 mg, taken once daily in the morning with breakfast. (The lower dose that I had requested in the hospital, as a start, wasn't working when I was under stress -- e.g., in a doctor's office.) My Metoprolol is now a time-release medication; it works for 24 hours and is weakest at precisely the time of day when my heart rate is naturally lowest, thus avoiding the danger of over-medicating and slowing the heart rate too much.

Dr. K discontinued my aspirin. He prescribed Digoxin, another beta-blocker designed to suppress heart beat. Dr. K also prescribed a drug newly "approved" in the USA, Pradaxa, an anti-coagulant. He gave me enough free drug samples of the Pradaxa (normally about $250/month), to last me until a stress test in his office. At that point, Dr. K said, he might be able to offer a more definitive diagnosis and recommend either a treatment program (possibly continuing the Pradaxa) or acceptance that I will need to live with the problem and continue taking Metoprolol and Digoxin to suppress the racing heart.

Dr. K confirmed what I had read about risk. The hospital doctors told me that I was at "high risk" of stroke, but I found later (and confirmed by my cardiologist) that the actual risk of stroke for a 66 year old man with afib, without medication, is, say, only about a 2% chance per year. With medication, it drops to about 1% per year. (The exact numbers are unclear to me.) So, relatively there is a much higher risk (100%) of stroke with not taking an anticoagulant, but the absolute level of risk is fairly small. On the "CHADS" scoring system (0 for the lowest risk, 6 for the highest risk), I am in the 0 category. As usual, the hospital doctors were being (over) cautious, perhaps for legal or regulatory reasons as well as training.

The pharmaceuticals I am taking now (Metoprolol, Digoxin, and Pradaxa) caused diarrhea in the first week. That problem lessened after about five days and then ceased when I began adding a probiotic (over the counter, chewable tablet, one per meal, containing Lactobacillus Acidophilus and L. Bifidus). I take all medications in the middle of meals, but spaced apart.

I am taking at meals two nutraceuticals -- nonprescription nutritional supplements designed to address specific problems -- recommended by two cardio physicians whose books I have read (with serious doubts, in one case): cod liver oil (1 teaspoon/meal), Vitamin B12 (50 mcg, 2 x week), and magnesium oxide/gluconate (1/day, 250 mg, which is about 63% of the Recommended Daily Allowance). The largest sources of magnesium are animal products and "seeds" (grains, and so forth). I can eat no animal products (except fats) or "seeds" without bringing my "-itis" problems back. (See "Key Posts" in the upper right corner.)

Three circumstances now accelerate my heart rate disturbingly: sitting up or standing up too quickly; compression (for exmple, bending over to tie my shoelaces); and mental stress (for example, reading the news). Mental stress is the strongest cause and the most difficult for me to control, but I am learning. My quality of life might depend on it.

GENERAL OUTLOOK: As of Jan. 25, a month after leaving the hospital, I have fully recovered my strong appetite, energy level, and exercise schedule (light weights, stretching, and walking 2 hours/day). Although I don't expect to live as long as I had originally hoped (85), I am cautiously hopeful that I can continue to live well for more years without yet starting to slide down the pharmaceutical spiral of ever-more drugs that treat the destructive effects of earlier drugs. I have no fear of death or of dying. I hate the idea of becoming progressively sicker because of pharmaceuticals.

UPDATE, 2011, Jan. 31, 10 am stress test: I took the stress test and enjoyed it. The main conclusions Dr. K reached are: (1) I have no heart problems other than the atrial fibrillation, and even that is not major; my heart efficiency is low but not dangerously so. (2) The Metoprolol and Digoxin are indeed suppressing my heart rate. (3) I need to continue the anti-coagulant Pradaxa until I can make a decision (after one more tests in three weeks) whether to have cardioversion or continue with some combination of drugs. (4) I probably will be able to replace the Pradaxa with a daily aspirin, eventually. (5) I am still in the bottom, least-risk category of the ranking for stroke risk. (That is why an aspirin will be sufficient, long-term.)

The details are, so far, unclear, but apparently the next step is to begin an additional drug for a few weeks, and then I will have another EKG. Apparently the new drug is a mild form of cardio-version (turning the irregular heart beat back to normal) that is safe for outpatient use. (More serious electrical, chemical, or surgical cardio-version would require hospitalization because of the doctors' fear of a stroke from a blood clot released during the cardio-version process. Apparently, when I begin the new drug, I will continue taking the Digoxin and Metoprolol but at reduced levels. I may have more details after February 2.

UPDATE, Jan. 31, 5 pm and 11 pm: While preparing dinner, I injured one finger with a tiny cut. It bled a small amount, but continuously for 30 minutes, despite soaking in cold water and wrapping it in tissue.

UPDATE, Feb. 4: Today I received my new instructions, via my doctor's medical assistant/nurse. I will continue taking Metoprolol (1/day, but now at 25 mg, half the previous daily dose), for rate control, and Pradaxa (2/day), for anticoagulation. Replacing the Digoxin will be Multaq (dranedarone), 400 mg/tablet (2/day), for rhythm control, as a sort of out-patient cardioversion, apparently. I am also continuing my nutraceuticals: probiotic (1/2 per meal), magnesium (250 mg, 1/day), cod liver oil (1 t, 3/day), and B12 (50 mg, 2/week). I am scheduled for an EKG in my doctor's office on Feb. 17.

I have a growing list of questions about the drugs, especially the Multaq: what are its advantages over its competitors? Safer? More effective? Only one governmentally approved for outpatient cardioversion (as my doctor had suggested in the past)?

UPDATE, Feb. 17: An EKG in my doctor's office revealed that I do indeed still have atrial fibrillation and my heart rate, even under medication, remains high (78 bpm). The chemical treatment (Metoprolol, Multaq), which is therapy stage 1, failed to reset my heart rhythm or lower the rate enough.

I agree with my doctor that trying the next stage of therapy, stage 2, is worthwhile, though it is expensive and has a success rate of only about 65% of the cases. This stage 2 is "cardioversion," in which I will be sedated at the hospital and then given a painless shock to my heart. The purpose is mainly to restore proper rhythm, apparently. I don't know whether lowering the rate is also a goal of cardioversion. The brochure I received from my doctor speaks only of rhythm restoration. My understanding though is that if the rhythm is proper, the rate will follow naturally. (I will need to double-check that.)

If the treatment does not work, or if it works only for a few months, I will not repeat it. (The success rate of repeated treatment is very low.) Instead, I will use only one drug, Metoprolol (plus an aspirin as the anti-coagulant), to fully control the heart rate and thereby make the heart more efficient. This approach is similar to the one Dr. McDougall describes in his newsletter article on Coumadin: Suppress the high heart rate (which functionally is the key problem) and live with it.

UPDATE, Feb. 24: Today I had the cardioversion therapy. It worked! My heart is now back in a normal rhythm and rate range. The procedure was painless, thanks to the intravenous sedation. If you have the procedure done, don't drive or make any important decisions afterward! I could barely form a complete sentence. I came home and slept for three hours.

My doctor convinced me that, on the short-term, I need to continue the drugs in order to keep my heart in a narrow range of rate (Metoprolol) and rhythm (Multaq), as well as to protect myself from a clot expelled by my now more effective heart (Pradaxa).

UPDATE, March 8: I consulted with my cardiologist today. Here is the plan: (1) Stop taking Pradaxa, the anticoagulant. (Drop from two doses daily to 1 dose daily, for 3 days, then stop altogether.) (2) For the rest of my life, take an 81 mg aspirin tablet daily as an anticoagulant. (3) Stop taking the Multaq after one more week. (4) For the rest of my life, take Metoprolol, 50 mg, time release, every morning, to keep the heart beating in a low range, thus avoiding a higher range that might send it into fibrillation again. The two usual causes of returning to afib are: drinking alcohol and general anesthesia for surgery.

I have hired a nurse-researcher to help me gather information about metoprolol: What are the risks of long-term usage? (My doctor says there are no established cumulative adverse effects.)

UPDATE, March 19: I have returned to normal, almost. I am walking as quickly (3 mph) and as far (5-6 miles/day) now as I did before the afib episode. I have stopped taking the daily aspirin. I do not need any anti-coagulant, either in general or in particular for the former afib problem. Now I am taking only the Metoprolol, 50 mg, a low dosage, but one high enough to make me drowsy two hours after swallowing it with breakfast. I am considering experimenting with a half-dose. I am continuing to take 1 teaspoon of cod liver oil per meal, one magnesium tablet (250 mg, 60% of RDA) per day, and two 50 microgram Vit. B12 tablets per week. The oil and magnesium are recommended by some cardiologists, though in much higher doses than I am taking. I am also continuing to take half a probiotic wafer per meal.

UPDATE, May 5: I now take 25 mg of Metoprolol. (I am cutting the regular tablets in half.) I take no other medications: no aspirin, no magnesium, and no cod liver oil. I continue to take a probiotic and a Vitamin B12 tablet (50 micrograms twice weekly).

UPDATE, August 26: Yesterday I stopped taking the Metoprolol. My mood is more positive; food transit time is a little faster; and I am much less drowsy. My blood pressure and heart rate have risen (about 10/10 and 10, respectively). That increase -- if it goes no higher -- is not alarming, but it is worth watching.

UPDATE, April 24, 2012: In March, 2012, I went back into afib. The cardioversion worked for one year. I do not know what caused recurrence. In a local emergency room, the physician said I was dehydrated and "moderately low" anemic. The hospital found no other possible causes (as in the previous episode). I never noticed being particularly thirsty. Now I am wrestling again with trying to decide what to do: Continue with medication (Metoprolol, 50 mg) to control the rate (about 130 bpm without medication, about 80 with medication) and blood pressure (about 125/80 with, 150/90 without)? Or try cardioversion again, and if that doesn't work, try more invasive procedures? This time, I may choose to take the medication and just live (or die) with it. I will write more after I resolve some of the many issues.

UPDATE, September 15, 2012: After taking 50 mg of Metoprolol daily April-July, and after refusing a second cardioversion, my heart has returned to normal sinus rhythm. My physician confirmed that a few days ago, while I was taking 25 mg of Metoprolol. (Because my heart rate has been dropping as low as the 40s, I have begun taking 12.5 mg, half a 25 mg tablet.) I probably will continue the Metoprolol. I am monitoring my heart rate and blood pressure. I have discussed the possibility of substituting digoxin, but my physician and I have not yet made a decision. Possible causes of a return to normal rhythm are: (1) an increased dosage of Vitamin B12 (from c. 250 to 1250 micrograms/week) in the two weeks before; and (2) resumption of using salt (containing iodine). The afib has disappeared as "spontaneously" as it had appeared.

Burgess Laughlin
Author of The Power and the Glory: The Key Ideas and Crusading Lives of Eight Debaters of Reason vs. Faith