No abstract

The praecordial honk 709 Body position and respiratory Muller's manoeuvre Valsalva's manoeuvre Effort Amyl nitrite changes Constantly initiated or accentuated Constantly decreased Constantly decreased Constantly increased Constantly eliminin upright position and by or eliminated or eliminated ated expiration Constantly initiated or accentuated Constantly decreased Constantly decreased Constantly increased Decreased in upright position and by or eliminated or eliminated expiration Constantly initiated or accentuated Constantly decreased Constantly decreased Constantly increased Decreased in upright position and by