| 摘要 |
FIELD: medicine. ^ SUBSTANCE: pull a pluripolar electrode using intravenous access in a cavity of the right auricle and position it around the tricuspid valve in such a manner that distal poles there are in a lumen of a coronary sine, averages - in the area of cavo-tricuspid isthmus, and proximal - in the bottom of a lateral wall of the right auricle. From each pair an electrode, since distal, an electrical stimulation is made with the frequency exceeding a spontaneous rhythm, and registration bipolar electrogrammes is carried out from the next pair in a proximal direction with measurement of interval St-A at each step. The moment of St-A interval elongation more than on 80 ms in comparison with the previous step means location of the cavo-tricuspid isthmus between stimulating and registering pair and presence cavo-tricuspid blockade in a clockwise direction. Then the specified stimulation is spent in the opposite direction, since proximal pair and registration electrogrammes from the next pair in a distal direction. Elongation of St-A interval more than on 80 ms in comparison with the previous step means presence cavo-tricuspid blockade in a counter-clockwise direction. ^ EFFECT: increase of accuracy of estimation of cavo-tricuspid isthmus blockade. ^ 2 dwg, 1 ex |
