Ventricular arrhythmias include ventricular fibrillation and ventricular tachycardia. Ventricular contraction occurs between ventricular depolarization and repolarization. Cardiovascular features include hypotension, sinus bradycardia, and ventricular arrhythmias. Early diastole is a suction mechanism between the atrial and ventricular chambers. It is used both in supraventricular arrhythmias and ventricular arrhythmias. Ultimately, ventricular tachycardia leads to ventricular fibrillation. The AV node connects the atrial and ventricular chambers. This increases the risk of developing ventricular arrhythmias, including fatal ventricular fibrillation. Arrhythmias such as tachycardia, bradycardia, atrioventricular block, and premature ventricular beats have also been reported. Causes of isolated right ventricular diastolic failure are uncommon. Amiodarone can be used in individuals with hemodynamically stable ventricular tachycardia. Likewise, heart failure may occur in those with dilated left ventricular and normal systolic function. Heart failure may occur after rupture of ventricular aneurysm. Amiodarone may be used in the treatment of ventricular tachycardia in certain instances. Calcium channel blocking drugs results in regression of right ventricular hypertrophy.