Subxiphoid echocardiographic assessment of left ventricular wall in old myocardial infarction.
We studied by cineangiography and standard and subxiphoid echocardiography the left ventricular wall motion in 50 patients with old myocardial infarction and 10 normal subjects. Coronary artery angiography showed a good correlation with the electrocardiographic site of infarction and with the asynergic areas detected by cineventriculographic examination and bidimensional echocardiography. From the correlation of data related to the asynergic areas detected by angiographic and echocardiographic methods it was possible to establish that subxiphoid approach allows to visualize the posterior-lateral wall whereas the parasternal approach the posterior-inferior wall of the left ventricle. Two-dimensional echocardiography from the subxiphoid approach resulted to be a useful and reliable technique for detecting the apical asynergies. The left ventricular wall motion parameters detected by M-mode echocardiography showed significant modifications in all the groups either in the comparison SUBX versus ST or in that with the control group. The subxiphoid approach either M-mode or bidimensional was, therefore, useful in the evaluation of the asynergic areas of the left ventricular lateral wall. The association of SUBX with ST provides further information on the left ventricular wall motion and then, since different areas are visualized with the two techniques, on the extent of myocardial damage.