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Coronardurchblutung bei Erhöhung des arteriellen Kohlensäuredrucks

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Summary

In 9 dogs the heart rate was kept constant by electrical stimulation of the right auricle after elimination of the sinus node. Hypercapnia was induced by increasing inspiratory carbonic acid concentration at constant oxygen concentration. The mean arterial carbonic acid partial pressure increased from 40.5 to 70.5 mm Hg. The mean pH decreased from 7.30–7.14. Under these conditions the coronary flow did not change. Systolic and diastolic aortic pressure, left ventricular pressure, and the maximal rate of pressure rise in the left ventricle remained unchanged. Alterations of coronary blood flow caused by increased carbonic acid concentrations as described by other authors can be explained by a change of hemodynamic conditions.

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Kosche, F., Raff, W.K. & Lochner, W. Coronardurchblutung bei Erhöhung des arteriellen Kohlensäuredrucks. Pflugers Arch. 328, 170–175 (1971). https://doi.org/10.1007/BF00592444

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