PMID: 10872698Jun 29, 2000Paper

Adaptation to myocardial ischemia during repeated ventricular pacing in patients with coronary artery disease

Scandinavian Cardiovascular Journal : SCJ
K Ylitalo, K Peuhkurinen


The purpose of our study was to evaluate whether repeated ventricular pacing is able to induce adaptation against ischemia in coronary artery disease patients. Fifteen patients with documented coronary artery disease were subjected to two successive periods of rapid ventricular pacing (150 bpm) of equal length (295+/-33 s), the first being limited by intolerable anginal pain. The second pacing period, of the same length as the first, was initiated after the disappearance of angina and ST depression, the mean resting time being 433+/-30 s. Blood samples for the determination of transcardiac differences in glucose, lactate, free fatty acids, K+, pCO2, pH, oxygen saturation and noradrenaline were taken from the femoral artery and coronary sinus before and at the end of each pacing period. The mechanical performance of the hearts was followed by continuous monitoring of intra-arterial blood pressure and pulmonary capillary wedge pressure, and the observed adaptation in the measured variables during the successive pacing tests was correlated with the duration of angina, severity of coronary artery disease and degree of collateralization. Changes in the transcardiac pH and K+ differences, ST segment and pulmonary capillary wedge pres...Continue Reading


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Feb 12, 2002·Scandinavian Cardiovascular Journal : SCJ·K Ylitalo, K Peuhkurinen

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