[Disorders of myocardial function in patients with normal coronary angiography].

An attempt is made to estimate the value of intraventricular injection of contrast media in the procedure of angiocardiography for registration of a latent disease of the myocardium. For this purpose the parameter of the cardial function of 350 patients are analysed depending on the severity of the coronary heart disease. Under resting conditions the left ventricular end-diastolic pressure (LVEDP) of patients with coronary heart disease was 19.9 +/- 7.98 mmHg. The LVEDP of patients with the angina pectoris syndrome but normal epicardial coronary arteries was 15.6 +/- 5.45 mmHg. The LVEDP of the most of the patients rose after injecting contrast medium in the left ventricle independent of the resting level. Patients with coronary heart disease had a LVEDP of 23.7 +/- 9.48 mmHg after injecting the contrast media, while patients with normal coronary arteries had a LVEDP of 19.2 +/- 7.21 mmHg. The left ventricular systolic pressure and the parameters of contractility did not change significantly after injecting contrast media. The injection of contrast medium into the left ventricle--i.e. the ventriculography--is in a qualified sense a volume stress to the left ventricle. That means an increase of a normal LVEDP after an injection of contrast medium uncovers a preclinical disease of the left ventricular myocardium.