[Study of the effect of arterial hypertension on the status of left- ventricular myocardium based on thallium-201 scintigraphic data]. / Vliianie arteria'lnoi gipertenzii na sostoianie miokarda levogo zheludochka po dannym stsintigrafii c 201Tl.

Functional relationship was examined between the parameters of myocardial perfusion, left ventricular myocardial mass, and complications developed in patients with coronary heart diseases concomitant with arterial hypertension. Examination was made of 102 patients with various natural history of arterial hypertension, of whom 53 had concomitant angina pectoris, myocardial infarction, congestive heart failure, sudden death, or rhythm disturbances. As "perfusion deficiency" progressed, the patients with complicated natural history of arterial hypertension were found to increase in number with higher left ventricular myocardial mass index. In patients with arterial hypertension, the critical hypertrophy phase in which the index of left ventricular myocardial mass was 110-120 gm2 was demonstrated to be followed by myocardial perfusion deficiency. If the myocardial mass index is 90 g/m2, it means a phase of compensatory hypertrophy, which shows higher myocardial perfusion.

[Assessment of the diagnostic value of myocardial scintigraphy with 201Tl chloride in women of various ages]. / K otsenke diagnosticheskoi znachimosti stsintigrafii miokarda 201Tl-khloridom u zhenshchin v razlichnye vozrastnye periody.

Myocardial scintigraphy with the use of 201-thallium was performed in 92 female patients aged 38 to 87 years (initially and after 24 hours). The menstrual cycle phases were revealed to influence perfusion and metabolism of the myocardium in women with the normal ovarian cycle which should be taken into consideration in the interpretation of scintigrams in young women. The results of examining elderly persons with a long menopause have demonstrated excess saturation of scintigrams, both initial and long-term, which is primarily determined by changes in the coronary bed by the three-vascular injury type and hypertrophy of the left ventricle myocardium.

[Localization of left ventricular myocardial lesions using 201Tl chloride scintigrams]. / Lokalizatsiia porazheniia miokarda levogo zheludochka po stsintigrammam s 201Tl-khloridom.

The authors propose some methodological approaches including stereometric methods, for determination of visible left ventricular walls in different projections of a gamma-chamber detector with relation to a position of the left ventricular anatomical axis (LVAA) in space to improve topographic diagnosis of left ventricular myocardial lesions with 201Tl. The above method can be implemented on computer.

[Use of Tl-201 in the diagnosis of parietal left-ventricular thrombi]. / Ispol'zovanie 201Tl v diagnostike pristenochnykh trombov levogo zheludochka.

The authors have proposed a method for the determination of left ventricular parietal thrombi to form isolated images of the left ventricular cavity (by the 1st passage of 201Tl) and its walls in the same projection in the computer memory. After special processing the images are superimposed: the coincidence of the contours of the cavity and myocardial wall will suggest the absence of a thrombus, noncoincidence of the contours in some place will suggest the site and size of a thrombus. The method is safe for a patient and does not require additional manipulations.