POTS Heart Rate: Why 150 BPM Can Feel Better Than 90

If you wear a watch, you already know the pattern. There are days when your heart rate hits 150 beats per minute on standing and you are shaky, but you get things done. Then there are days when it barely climbs past 90 and you cannot get through a sentence. The number and the day do not line up, and if you have tried to use the number to predict the day, you have been burned.

That mismatch is not noise. It is one of the most useful signals you have, once you know what the heart rate in POTS is actually for.

What a High Heart Rate in POTS Is Trying to Accomplish

Start from the beginning. When heart rate rises in POTS, what is it doing? It is a rescue mechanism. Your body is trying to get more blood, and more oxygen, to your brain. It is the same thing that happens any other time your heart speeds up. Walk up a steep hill and your heart rate climbs because it needs to pump blood faster to reach your muscles and your brain so you can keep walking. In POTS the same logic applies, even though nothing about standing in the kitchen feels like exercise. The heart is delivering more blood supply to tissues that are not getting enough.

What changes in POTS is that the whole delivery system has become inefficient. When it is inefficient, the body has to reach for more effortful rescue techniques to keep the brain supplied, and cranking the heart rate is the loudest of those. Our team has covered why the heart rate is not the problem and where the tachycardia actually comes from. This article is about what the day-to-day variability means.

The Discrepancy Days: Reading the Gap Between Number and Feeling

Put the 2 kinds of days side by side. On the high heart rate day where you are doing okay, your body is able to put extra energy into driving the circulatory system, produce more blood flow, and sustain it. The rescue is keeping up. It is keeping you functional, even if it feels wired. On the low heart rate day where you feel terrible, your body is not doing the normal thing that would generate that rescue. The compensation that would help you feel better is not showing up.

So the discrepancy between the 2 days tells the story. If your heart is capable of taking the rate up, and today it is not, why? That is a great question, because the answer says something specific about what your body is missing on that day. It is a hard thing to notice from inside a single body. In clinic, where our team sees it across many patients, the pattern is obvious: 2 people can have the same diagnosis, one with a moderately high heart rate who feels awful and one cranking 150 who has a different set of symptoms and may not feel as bad.

What has to be said clearly, especially in public, is that the heart rate level by itself does not tell you how bad the symptoms are or how bad the problem is. It tells you how well your body uses the speed of the heart, which is a muscle, to compensate for not distributing blood accurately. Some hearts compensate hard and produce one presentation. Some barely respond, and that is not automatically a better outcome. It may mean the person is worse at distributing blood and worse at compensating for it, so they function worse. Grading yourself as winning or losing by heart rate is probably the wrong strategy, because a high number can be the evidence that you are winning.

Why Inefficient Systems Go From Specific to Generalized

There is a neurology principle underneath this. When a system becomes inefficient, the thing you notice is that movements that should be very specific become generalized. Reach for a notebook and a healthy nervous system stabilizes the spine, reaches with the arm, grasps with the hand. Done. In someone with a movement disorder like dystonia, the intent to move just the hand leaks into the neck, then the trunk, until far more of the body is involved than the task needs. Not because it is necessary. Because the signal from brain to hand is getting spread out.

Blood flow around the body, hemodynamics, is another movement pattern. Lose efficiency there and you have to compensate somewhere. If the body is not squeezing blood back through the venous system, or it is pooling in the wrong places, or your breathing is off and the carbon dioxide shift is narrowing brain vessels, or the brain is not managing flow well, then a different system has to pick up the work at a higher energy cost. The heart rate is that generalized compensation. It is the neck and trunk getting dragged into a job that should have been done by the hand.

That is why the variability is worth chasing rather than dreading. You rode in the car yesterday with your head cranked to one side for an hour, took in a flood of visual stimulus, and irritated a piece of that system. Today the efficiency of sending blood is different, so the heart works harder. There are a hundred reasons like that. The point is that it can change, and the difference between the 2 states is a pointer to where the problem lives.

What Beta Blockers Reveal About the POTS Heart Rate

One of the clearest places to see all of this is when the heart rate is changed artificially. A beta blocker blocks the signals that let the heart catch up, compensate, and rescue you. Take that compensation away and what happens? In some people the number drops and they feel a little better, because all the secondary consequences of a racing heart, the jitteriness, the anxious edge, quiet down. That is real and it can feel calming.

But look at the problem the heart rate was trying to solve. Did that get fixed? A lot of people notice a peak in those secondary symptoms and no change in what they can actually do. In many cases capacity gets worse, because the one thing the body was doing to maintain circulation is now unavailable, and the circulation pays for it. The research matches this. In a randomized crossover trial of 54 POTS patients, a low 20 milligram dose of propranolol reduced tachycardia and improved symptoms over 2 hours, while a higher 80 milligram dose lowered heart rate further and did not improve symptoms any more, and may have worsened them. The authors titled the paper "less is more."

A second study from the same era compared 4 weeks of propranolol against 3 months of exercise training in POTS patients. Both lowered standing heart rate. But propranolol lowered standing cardiac output, and only training improved quality of life. Lowering the number is easy. Restoring the circulation the number was compensating for is the actual win, and when it happens, people move off the ceiling where they could not do more than a certain amount and start regaining ground. Our team's position on medication in POTS is the same as it is here: useful, with a ceiling.

If Not Heart Rate, Then What? Brain Blood Flow

So what should you look at instead? It is very convenient to wear something on your wrist or in your ear that hands you a daily score, and our team is not against that. But the measurement that actually predicts what the rest of the body is going to do is blood flow into the brain. Getting blood to the brain is one of the most important problems your body has to solve, second by second, for your whole life. If you understand how well that is being solved, you have a much higher predictive value for everything downstream, including the heart rate.

Unfortunately it is not a wearable. It takes transcranial Doppler during a tilt test, which is why our team measures it. The published data point the same direction. In a 2020 study of ME/CFS patients, many of whom met POTS criteria, the reduction in brain blood flow on tilt was 26 percent versus 7 percent in healthy controls, and the total symptom burden rose in a straight line with the size of the drop. The blood flow, not the heart rate, was the number that tracked how people felt.

Should You Track Your Heart Rate With POTS?

Yes. Track it. You may find real patterns. Just do not check it all the time. When a tracker hands us a score, how we feel starts to depend on the score. In a controlled experiment on people with insomnia, researchers gave participants sham feedback about their sleep from a wearable, randomly telling them their sleep efficiency was good or poor. The fake number changed how sleepy, how sharp, and how well they said they felt the next day. That study was about sleep, not heart rate, but the mechanism does not care what the metric is. If you are told your number is great, you tend to assume you are doing better.

So the trick is to track daily and look weekly. Review the trend in retrospect instead of reading the live number and deciding how your day is going to go. Heart rate is one data point in a constellation, and zooming out to the whole picture is what gives you room to actually progress instead of reacting to the watch.

The Subjective vs. Objective Gap in Dysautonomia

In 2024, researchers at the Brigham and Women's autonomic laboratory asked a simple question with a large dataset: do the symptoms people report line up with what autonomic testing measures? They compared validated symptom questionnaires with standardized autonomic tests in 2,627 patients. The subjective instruments agreed with each other. The objective instruments agreed with each other. And there were no meaningful correlations between the 2. How people felt was not predicted by how big the measurable abnormality was.

That sounds discouraging until you apply it to your watch. It means you can take the 2 things apart in daily life. A heart rate going high may be the better sign for you that day, because it shows there is capacity to compensate. A heart rate that used to run high and is now dropping while you feel worse may be telling you that your recovery is not as good as it could be, and that there is a problem worth understanding more. Our team has written about why POTS symptoms so often fail to match test results, and this is the same lesson from the other direction.

What to Do With This

Stop grading how you feel on a given day by how high your heart rate went. Ask instead: how well is the blood flow to my brain being rescued today, and is my heart rate playing a role in that? That question gets you somewhere. It moves you from managing a number toward working on the capacity underneath it, and from our team's perspective, greater capacity is where everyone wants to go.

If you want a walk-through of that process, one that looks beyond the cardiac system rather than segmenting you by specialist, the free POTS roadmap below is where to start. It is not medical advice. It may be enough education to help you figure out where your breakthrough is going to come from.

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