Hello,
Iâve gone through your details carefully.
Holter (July) â only 6 PVCs, otherwise normal.
Echo (March) â normal.
Resting ECG â normal.
Symptoms â during exercise, heart rate shoots up to 250â300 bpm within 2â3 minutes, then settles down quickly, with no associated fainting/dizziness/chest pain.
Important points:
Hypertrophic Cardiomyopathy (HCM):
HCM is a structural disease of the heart muscle.
It is diagnosed by echocardiography, not just ECG.
A normal echo in March essentially rules out HCM at that time.
Short-term high heart rates during exercise do not cause HCM. HCM is not acquired from fast heart rates â itâs usually genetic.
High pulse rate (250â300 bpm):
This is not normal sinus tachycardia; the heart rate usually maxes around 180â200 bpm with exertion in young people.
If what you measured is accurate, it suggests a possible paroxysmal supraventricular tachycardia (PSVT), atrial tachycardia, or another arrhythmia.
Since you remain symptom-free, it may not be dangerous, but it needs proper evaluation.
Resting ECG:
A normal resting ECG does not rule out arrhythmias â because those episodes happen only during exertion.
But yes, if the ECG is normal, it means no baseline HCM or major conduction abnormality.
What you should do next:
Get a Treadmill Test (TMT / Exercise Stress Test) under supervision â this will record your heart rhythm during exertion.
If the pulse really goes >250 bpm, it should be captured.
Consider a repeat echo after 6 months for reassurance.
If episodes persist, discuss with a cardiologist (preferably electrophysiologist) for further rhythm monitoring.
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Summary: Your fast heart rate during exercise has not caused HCM, and a normal echo already rules that out. The main concern is to identify why the pulse is shooting up so high â most likely an arrhythmia that needs documentation with a stress test or extended Holter.
Answered2025-08-20 10:31:46
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