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Myocardial Contractility and Relaxation After Deep Hypothermic Circulatory Arrest in a Neonatal Piglet Model
Author(s) -
Tirilomis Theodor,
Popov AronFrederik,
Liakopoulos Oliver J.,
Schmitto Jan D.,
Bensch Marc,
Steinke Katja,
Coskun K. Oguz,
Schoendube Friedrich A.
Publication year - 2012
Publication title -
artificial organs
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.684
H-Index - 76
eISSN - 1525-1594
pISSN - 0160-564X
DOI - 10.1111/j.1525-1594.2011.01242.x
Subject(s) - contractility , deep hypothermic circulatory arrest , circulatory system , medicine , anesthesia , cardiology , perfusion , cerebral perfusion pressure
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.