This is called dynamic obstruction . Diagnosis of obstructive hypertropic cardiomyopathy can be made by echocardiography and by left heart catheterization. Each of these options has advantages and disadvantages, and should be discussed with your doctor. If obstruction to flow is present, the treatments are as above. If there is no obstruction, only the medications described above are used.
Fast heart rhythms such as ventricular tachycardia .
Unfortunately, the cellular structure of the heart muscle in hypertrophic cardiomyopathy is not normal. Perhaps for this reason, people with this condition are at risk for sudden death due to ventricular tachcardia and ventricular fibrillation. There are no good diagnostic tests for identifying the few people with this condition who will die suddenly. Electrophysiological study has been reported to be helpful by some physicians but not all. Until relatively recently, there were no good treatments for patients with hypertrophic cardiomyopathy who were at high risk for sudden death.