Hello!
Thank you for asking on HCM!
I read your question carefully and understand your concern.
His symptoms don't seem to be cardiac related. But I recommend consulting with his attending physician for a careful examination, a resting ECG and a cardiac
ultrasound, to examine better his cardiac function (based on the fact that he has suffered a
heart attack in the past and has stopped taking all the medications).
I also recommend performing a fibrogastroscopy (for his excessive burping, which may be related to a stomach disorder), and a routine
blood test, Doppler ultrasound of the leg and neck vessels, kidney and liver function tests, blood electrolytes.
I would also advise to closely monitor his blood pressure.
Headaches are often caused by uncontrolled
high blood pressure.
Hope to have been of help!
Greetings! Dr. Iliri