Left Ventricular Wall Motion Assessed by Using Fixed External Reference Systems

44 patients undergoing evaluation of left ventricular wall motion, including 15 with valvular heart disease, 19 with coronary artery disease (12 with previous myocardial infarction), and 6 normal subjects.

Method R (assessment of left ventricular wall motion using two external markers and the diaphragm as an internal marker)

Method A (assumes symmetric movement toward geometric center) and Method B (assumes symmetric movement toward the base of the heart)

Detection of left ventricular asynergy (akinesis or dyskinesis) and correspondence to site of infarctionsurrogate