Cardiac: Asymptomatic or if symptomatic, then left ventricular ejection fraction (LVEF) at rest must be >= % and must improve with exercise. Asymptomatic or if symptomatic then left ventricular ejection function (LVEF) at rest must be >= % and must improve with exercise Cardiac: asymptomatic or if symptomatic then left ventricular ejection fraction (LVEF) at rest must be >= % and must improve with exercise Asymptomatic cardiac function or if symptomatic then left ventricular ejection fraction (LVEF) >= % and must improve with exercise Cardiac: asymptomatic or if symptomatic then left ventricular ejection fraction (LVEF) at rest must be > % Cardiac: asymptomatic or if symptomatic then left ventricular ejection fraction (LVEF) at rest must be >= % and must improve with exercise Cardiac: asymptomatic or if symptomatic then left ventricular ejection fraction (LVEF) at rest must be > % and must improve with exercise Cardiac: asymptomatic or if symptomatic then left ventricular ejection fraction (LVEF) at rest must be > % and must improve with exercise