[Peculiarities of the anatomical structure of the posterior-lower part of the right atrium in people of various constitutional types].

: The peculiarities of the anatomical structure of the posterior-lower part of the right atrium (PLP-RA) were studied in autopsy material obtained from 120 men and women aged 22-72 years belonging to various constitutional types. It was found that in persons with pyknic constitution, long PLP-RA prevailed over the short one (59.4 [character: see text] 40.6%, respectively), while in asthenic constitutional type short PLP-RA was significantly more frequent (60.4 [character: see text] 39.6%, respectively). It is noted that during the procedure of radiofrequency ablation indicated in view of the atrial arrhythmias, high probability of the occurrence of concave or purse-shaped (saccular) PLP-RA in patients with asthenic constitutional type must be taken into account. This PLP-RA shape presents greatest difficulties during the course of operative treatment of cardiac arrhythmias.