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[Synchronous mechanical heart massage during assisted circulation].

In tests on dogs specially devised cardiac massage appliances and a monitoring system synchronizing the mechanical massage with the R wave on the ECG were used in carrying out a synchronous mechanical chest massage in conditions of an experimentally induced incompetence of the cardiac ventricles. Optimal parameters of the hemodynamics were recorded with the massage proceeding in such a manner, when mechanical action on the cardiac ventricles coincided with termination of the maximum pressure period of the myocardium. The synchronous ancillary cardiac massage effected under conditions of ventricular incompetence was found to be attended by a rise of cardiac output and increased aortic pressure, falling tension in the auricles and normalization of the acid-base equilibrium figures. Synchronization of the massaging appliance operation with cardiac contractions is an effective method of assisted circulation in acute incompetence of the heart valves.

Animals↗
PubMed1976

[Possibility of early operations in severe traumatic shock under the protection of assisted circulation].

The results of treatment in 28 patients with extremely severe multiple injuries are analysed: 21 of them had open, comminuted, crushed fractures or tearing of 44 extremities. After a failure of antishock measures an assist extracorporeal circulation with oxygenation was instituted, and surgery was performed. In 128 experiments on dogs a explosive bullet wound was inflicted on the knee joint: a comminuted intraarticular fracture of 2-3 bones was produced, followed by 25-30% bloodletting and additional trauma of the damage site. In 23 control experiments without using the heart-lung machine but with routine antishock measures 83% of animals died after the amputation and 17%--survived. A conclusion is made on the rationale and efficacy of an assist extracorporeal circulation in severe traumatic shock, that would make is possible to perform an early operation and to eliminate "the trigger mechanism" of shock.

Adult↗
PubMed1975

[Evaluation of 2 years' experience with assisted circulation by diastolic counterpulsation].

The authors report their two years' experience of circulatory assistance by diastolic counter-pulsation with an intra-aortic balloon. This technique was used in 23 patients: 9 cases of cardiogenic shock due to acute myocardial infarction, 9 septal ruptures, 1 rupture of the papillary muscle of the mitral valve, 1 acute ventricular aneurysm, 2 high risk coronary arteriographies and 1 case of early post-infarction recurrent ischemia. It confirms the gravity of cardiogenic shock as, in spite of the frequent improvement in hemodynamic parameters under counter-pulsation, there was only one survivor. The efficacy is greater in cases of septal rupture, where the author obtained 3 survivors out of 6 operated cases. The security of the method and its innocuity permit one to carry out high risk coronary arteriography and extend the indications for circulatory assistance, to certain cases of unstable angina or early recurrent anginal following acute infarction.

Adult↗