Key result
Prostaglandin F2α injection in anaesthetized dogs increased systemic and pulmonary arterial pressures and coronary venous flow, while transiently decreasing cardiac output and cardiac efficiency.
Why the study?
Does prostaglandin F2α injection alter coronary venous flow and myocardial metabolism in anaesthetized dogs?
Does prostaglandin F2α injection alter coronary venous flow and myocardial metabolism in anaesthetized dogs?
In an animal model, prostaglandin F2α alters systemic and pulmonary hemodynamics and increases coronary venous flow without significantly changing myocardial substrate extraction.
Animal data on PGF2α hemodynamics require human validation; leaves open effects on clinical coronary flow or metabolism.
Summary General haemodynamics and coronary sinus flow (thermodilution flowmeter), and myocardial extraction of glucose, lactate, pyruvate and nonesterified fatty acid were measured before and after the injection of proslaglandin F2α in anaesthetized dogs. Systemic and pulmonary arterial pressures increased; cardiac output decreased transiently, coronary venous flow increased. Little change was found in myocardial O2 and CO2 metabolism. Cardiac efficiency decreased. Arterial lactate, pyruvate and non‐esterified fatty acid values increased; glucose was unchanged. Myocardial extraction values for these substrates did not change significandy. Some of the changes noted did not appear when stoichiometric amounts of prostaglandin F2α and prostaglandin E1 were injected together.
No takes yet. Share an insight, caveat, or question.
Maxwell Gm (1969) studied this question. Prostaglandin F2α vs. Baseline (before injection) was evaluated on General haemodynamics, coronary sinus flow, and myocardial extraction of substrates. Prostaglandin F2α injection in anaesthetized dogs increased systemic and pulmonary arterial pressures and coronary venous flow, while transiently decreasing cardiac output and cardiac efficiency.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: