Brief Answer:
I would explain as follows:

Detailed Answer:
Hello!

Welcome and thank you for asking on HCM!

I understand your concern and would like to explain that if your heart rhythm is a normal sinus rhythm (from the ECG) and also your cardiac function and structure results normal (from your cardiac ultrasound), then a a heart rate of 93 bpm doesn't mean that you have a cardiac disorder.

But otherwise an extra-cardiac cause may be responsible for an increased resting heart rate.

Possible endocrine disorder (hyperthyroidism, hyperparathyroidism, etc.), chronic anemia, blood electrolytes imbalances, chronic inflammation/infection and other exogenous stimulants (caffeine, nicotine, concentrated tea, etc.) may be responsible for this increased heart rate.

Also an inappropriate betablocker (for example atenolol) may lead to a rebound effect and thus tachycardia.

At the end, even persistent anxiety may be an important cause of an increased heart rate.

I recommend you consulting with your GP for a careful physical examination, a resting ECG and cardiac ultrasound, a chest x Ray study and some blood lab tests:

-complete blood count (for chronic anemia or infection)
-PCR, sedimentation rate (for inflammation)
-thyroid hormone levels
-blood electrolytes
-kidney and liver function tests, etc.

In case of persistent tachycardia, an ambulatory 24-48 hours ECG monitoring would be necessary to examine better your heart rhythm trends during the day.

Meanwhile, I would recommend avoiding stimulants (like caffeine, concentrated tea, smoking) and perform regular physical activity (walking, aerobics).

Hope to have been helpful!

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

Greetings!

Dr. Iliri

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