Abstract
A "functional diastolic murmur" was observed in a patient with 2:1 A-V block. It was characterized by dominant low frequency components. With the reinstatement of sinus rhythm the murmur was replaced by its component III and IV sounds. Because of its duration it should not be designated as "summation" gallop, but rather as a "follow-up" gallop. It seems probable to us, that such a gallop may occur not only with A-V block but also with simple tachycardia.
