Hypertrophic cardiomyopathy
If systolic ventricular function is preserved, pregnancy is generally well tolerated as the vasodilatory
effects of pregnancy are beneficial in patients without significant left ventricular outflow obstruction
[11]. However, atrial arrhythmias may occur as a result of increased atrial stretch and should be treated
promptly as they are not well tolerated because of diastolic dysfunction. The incidence of ventricular
arrhythmias and sudden cardiac death is not increased by pregnancy. Patients with significant outflow
tract obstruction, a history of ventricular arrhythmias and severe hypertrophy are at an increased risk of advanced maternal age, multiparity, smoking, previous chemotherapy or human immunodeficiency
virus (HIV) infection.