Table 1.

Possible mechanisms for myocardial ischaemia in HCM

Increased myocardial oxygen demand	Reduced myocardial perfusion
Myocardial hypertrophy	Small vessel disease
Diastolic dysfunction	Abnormal vascular responses
Myocyte disarray	Myocardial bridges
Left ventricular outflow obstruction Arrhythmia	Increased coronary vascular resistance