[Phono-mechanographic aspects in parietal blocks of left ventricle (author's transl)]

20 subjects with parietal ventricular block, detected by Frank vectoracardiogram, were submitted to phono-mechanographic examination. Prolongation of PEP was shown; the second period of electromechanical interval (A-C interval in apex-cardiogram) was given in detail. Isovolumetric contraction, systolic ejection time and diastolic period were normal. This pattern is quite typical for parietal block and completely differs from bundle blocks and cardiomyopathies. Therefore it may be useful in differntial diagnosis of these kinds of conduction disturbances as well.