Myocardial Contractility and Relaxation After Deep Hypothermic Circulatory Arrest in a Neonatal Piglet Model

Abstract

Cooling before circulatory arrest or ischemic arrest has been reported to influence myocardial performance in isolated neonatal hearts. The aim of the present study was to analyze indices of myocardial contractility and relaxation in an in vivo neonatal model after deep hypothermic circulatory arrest (DHCA). DHCA (18°C; DHCA group; n = 8) or mild hypothermic cardiopulmonary bypass ([MH-CPB] 32°C; MH-CPB group; n = 10) was applied in newborn piglets. After reperfusion (60 and 120 min), left ventricular dP/dt(max) increased in DHCA and MH-CPB, while-dP/dt(max) decreased slightly in DHCA and increased in MH-CPB. Nevertheless, the differences between the two groups did not reach statistical significance. In conclusion, left ventricular contractility remained stable after reperfusion following DHCA, to some degree at the expense of the diastolic function.

Artificial Organs 2012: A Year in Review

“…Theodor Tirilomis et al. of the University of Goettingen, Goettingen, Germany evaluated the indices of myocardial contractility and relaxation in an in vivo neonatal model after deep hypothermic circulatory arrest (DHCA). DHCA (18°C; DHCA group; n = 8) or mild hypothermic cardiopulmonary bypass ([MH‐CPB] 32°C; MH‐CPB group; n = 10) was applied in newborn piglets.…”

Impact of a Unique International Conference on Pediatric Mechanical Circulatory Support and Pediatric Cardiopulmonary Perfusion Research

“…Not only the quantity, but also the quality of these articles generated by this event based on high‐impact factors (average impact factor is greater than 2.7 annually) are also very impressive. Only during the last 2 years' events, topics covered show the clear evidence of the uniqueness and importance of this conference (Table ) .…”