Abstract:

Purpose: Atrioventricular (AV) delay optimization improves the hemodynamics and clinical parameters of patients treated with double-centric (DDD) heart pills. Pulse wave rate (NDH) is an index of arterial hardness and a sign of cardiovascular events. Increased NDH levels are a indicator of common atherosclerosis and hardened arteries. We aimed at exploring the effects of differential AV delay intervals (respectively 100, 150 and 200 ms) on arterial flexibility measurated by carotis-femoral NDH in patients with DDD pacing. Method: In our prospective study, a total of 40 patients with DDD pacing were taken. NDH was measured with 10 minute rest intervals for each AV delay (respectively 100 ms, 150 ms and 200 ms). Pacing is programmed at at least 10 battles/minute of resting heart rate. Using the Complior Colson (France) device that allows NDH to record the pulse wave online, it was automatically calculated according to the following formula: PWV(m/s) = distance (meters) / passing time (seconds). Results: There was a statistically clear positive correlation between the carotis-femoral NDH and the extension of the AV delay range (p<0,001). According to gender analysis, the weight, size, and back and back ratio were significantly higher in the male group. There was also no statistically significant difference between the groups in terms of age, body mass index, average, systolic and diastolic blood pressure, pulmonary pressure and differential AV delay intervals. The result: the extension of the AV delay range increased the carotic-femoral NDH values and therefore reduced arterial distensibility in patients with DDD pacing. Adjusting optimal AV delay can provide better hemodynamics in these patients.

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