[State of the atrial myocardium in patients with paroxysmal form of fibrillation arrhythmia]. / Sostoianie miokarda predserdii u bolnykh s paroksizmal'noi formoi mertsiatel'noi aritmii.

Seven two patients with coronary heart disease complicated with paroxysmal atrial fibrillation were studied by using accelerated atrial vector cardiography and M-mode echocardiography. Vector cardiography made it possible to reveal the signs of left atrial hyperfunction with normal left atrial echocardiographic dimensions. There were lower values for left ventricular myocardial contractility in parallel with higher echocardiographic dimensions of the left atrium. In the patients examined, progression of cardiosclerosis was accompanied by decreased amplitude values for the P loop on the vector cardiogram strip along with slower intraatrial conduction with an increase in the size of the left atrial cavity.

[Significance of echo- and vectorcardiographic studies of the heart atrium in the assessment of intracardiac hemodynamics and myocardial contractility]. / Znachenie ékho- i vektorkardiograficheskogo issledovaniia predserdii v otsenke vnutriserdechnoi gemodinamiki i sokratimosti miokarda.

Seventy three patients with coronary heart disease (CHD) complicated by paroxysmal atrial fibrillation (PAF) were examined. Vectorcardiography developed by I. A. Akulinichev and M-mode echocardiography were used to assess the status of left atrial and ventricular myocardia. An interrelationship was examined between the electrophysiological and echocardiographic parameters of myocardial performance, depending on the stage of circulatory insufficiency (CI). The patients with PAF-complicated CHD, unlike those with CHD alone, showed more severe myocardial conduction abnormalities despite the stage of CI. There were signs of compensatory left ventricular overload in the absence of clinical signs of CI. Comparison of ultrasound examination findings with high performance atrial vectorcardiographic ones increases the possibility of accurately assessing the cardiac performance by using noninvasive tools of examinations.

[The effect of an acute pharmacologic test with prozerin on cardiac and central hemodynamic indices in patients with myasthenia]. / Vliianie ostroi farmakologicheskoi proby s prozerinom na pokazateli serdechnoi i tsentral'noi gemodinamiki u bol'nykh miasteniei.

It has been shown that the overwhelming majority of myasthenia patients manifest changes in the cardiovascular system characterized by cardiac pains of different nature, duration and intensity, by electrocardiographic changes and lowering of the central hemodynamics and myocardial contractility. A direct relationship was established between heart involvement into the pathological process and myasthenia gravity as well as the underlying disease standing. The changes in cardiovascular function were not affected by the acute use of neostigmine.

[Value of echocardiography and amplified atrial vectorcardiography for selecting the methods of therapy and prevention of paroxysmal atrial fibrillation]. / Znachenie EkhoKG i usilennoi predserdnoi VKG dlia vybora metoda terapii i profilaktiki paroksizma'lnoi mertsate'lnoi aritmii.

Atrial and left-ventricular myocardial activity was assessed in 85 coronary patients with paroxysmal atrial fibrillation. Their age varied between 43 and 88 years. The methods used included ECG, amplified atrial vectorcardiography after I. T. Akulinichev's schedule (amplification: 1 mv = 100 mm) and M-scan echocardiography. The comparison of these methods has substantiated criteria for the selection of differential treatment and preventive measures in these patients, on the basis of the prevailing type of atrial myocardial changes ("arrhythmic", "hemodynamic" or "combined" ones). A supportive treatment with cardiotonic agents is advisable in cases of the "hemodynamic" type with apparent signs of the overstrain (dilation) of the left atrium or both atria. In the "arrhythmic" variant, where conductivity, automatism and excitation disorders are predominant, antiarrhythmic agents (cordaron, quinidine, adrenoblockers) are indicated while the "combined" type calls for combined treatment with cardiotonic and antiarrhythmic agents.