[The clinical importance of atrial fibrillation-flutter induced by electric transesophageal stimulation of the heart].

A study was made of the clinical importance of atrial fibrillation-flutter (AFF) induced by using different modes of left atrium stimulation via the esophagus. Ninety-eight patients were entered into the study including 40 patients with a history of AFF paroxysms, 24 with risk factors of AFF development, and 27 practically normal persons. The stimulation modes applied permitted reproducing stable paroxysms of AFF in 85 percent of the patients with a history of arrhythmias and in none of the normal persons.

[Various methods of determining left ventricular stroke volume by using echocardiography].

The determinations of stroke volume (SV) were used with the aid of different formulae in patients with the ischaemic heart disease with areas of akinesia of the left ventricle, and those with the acquired mitral and aortal valve disease, congestive cardiopathy and in healthy individuals. Tetrapolar rheography was used as control. The calculation of SV with echocardiogram of the left ventricle in patients with areas of akinesia of the left ventricle and valvular regurgitation gives unduly high figures.