Physiological and pharmacological aids in the diagnosis of cardiac murmurs.
D000680:Amyl Nitrite; D006326:Heart Auscultation; D006349:Heart Valve Diseases / Q000175:diagnosis*; D006801:Humans; D014662:Vasoconstrictor Agents
D014662:Vasoconstrictor Agents; D000680:Amyl Nitrite