Introduction
heart failure, systolic dysfunction
HEART FAILURE, SYSTOLIC DYSFUNCTION
Low as well as high plasma-potassium (p-K) levels have been shown to be associated with reduced survival [Myocardial function at low p-K levels has been studied experimentally in dogs (n = 27) and in healthy human volunteers (n = 10) [2D-speckle tracking echocardiography has been demonstrated to be a sensitive and robust method for detection of subtle systolic dysfunction as in preclinical heart failure [