Maintaining a relatively fast heart rate (approximately 90 beats/min) will minimize the time spent in diastole and leads to a decreased regurgitant fraction. Subendocardial blood flow may actually improve with tachycardia due to a higher diastolic pressure and a lower LVEDP. Sinus rhythm is preferable, but rapid supraventricular tachyarrhythmias are better tolerated in patients with AR than in patients with AS.