Dynamic Left Ventricular Outflow Tract Obstruction During Myocardial Ischemia in Mitral Valve Prolapse Syndrome.
Systolic anterior motion of the mitral valve (MV) with dynamic left ventricular (LV) outflow tract obstruction is a well known phenomenon in hypertrophic cardiomyopathy, or other forms of hyperdynamic LV function associated with hypovolemic states, or LV hypertrophy. We report three patients with MV prolapse in the absence of the above predisposing factors, who developed an LV outflow dynamic gradient during acute transient myocardial ischemia. An interaction between structural abnormalities of the mitral apparatus and ischemia-dependent LV shape deformity most likely accounted for the outflow gradient.
De Conti
Fabio
F
Divsione di Cardiologia, Ospedale P. Cosma, 35012 Camposampiero (PD), Italy.
Piovesana
Piergiuseppe
P
Nicolosi
Gianluigi
G
Lafisca
Nicolò
N
Mantovani
Enzo
E
Viena
Pietro
P
Pantaleoni
Attilio
A