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Dr. Andrew Rynne
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What is the cause for rapid heart rate?

What does it mean if I have an eating disorder and everytime I stand things go black and it becomes hard to stand only for a few seconds though ?Also my heart rate recently will be very rapid then all the sudden drop to th point where I can barely find it while checking my pulse?
Fri, 23 Oct 2015
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Cardiologist 's  Response

Welcome and thank you for asking on HCM!

I understand your concern and would explain that your symptoms may be related to orthostatic intolerance (orthostatic hypotension or postural tachycardia).

Have you measured your blood pressure during these episodes?

A head up tilt test is necessary to rule in/out this diagnosis.

If these episodes occur only after eating, it may also related to post prandial hypotension (an autonomic reflex from the gastric distension).

I recommend consulting with your GP for a careful physical examination, a resting ECG, a chest x ray study and some blood lab tests (besides the head up tilt test):

-complete blood count (for chronic anemia)
-fasting glucose
-blood electrolytes.

Hope to have been helpful!

Feel free to ask any other questions, whenever you need!

Best wishes,

Dr. Iliri
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