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Custodiol versus cold Calafiore for elective cardiac arrest in isolated aortic valve replacement: a propensity-matched analysis of 7263 patients.

OBJECTIVES: This study was designed to assess the impact of crystalloid cardioplegia (CCP) and blood cardioplegia (BCP) on short- and long-term outcome after isolated aortic valve replacement (AVR).

METHODS: A total of 7263 patients undergoing AVR at our institution between November 1994 and June 2015 were identified. CCP (Custodiol ® ) was used in 83% ( n  = 5998) and intermittent cold BCP in 1007 patients (14%). For 4790 patients, propensity scores were calculated from baseline data, risk factors, comorbidities and characteristics of the disease, resulting in 825 pairs. The primary outcome was operative mortality (OM).

RESULTS: There was no significant difference in OM between CCP and BCP cohorts [33 of 825 (4.0%) vs 35 of 825 (4.2%), P  = 0.90]. The incidence of postoperative complications was comparable between both groups. Long-term survival was also not different between CCP and BCP (log-rank test: P  = 0.9). Multiple Cox regression analysis demonstrated that mortality was significantly affected by renal function ( P  < 0.001), logistic EuroSCORE ( P  < 0.001), male sex ( P  = 0.005) and diabetes ( P  = 0.037). Patients with reduced left ventricular ejection fraction ≤30% showed improved survival when receiving BCP intraoperatively [odds ratio: 2.28 (1.12-4.63); P  = 0.03].

CONCLUSIONS: CCP and BCP provide equivalent outcome after isolated AVR. However, BCP seems to be beneficial for patients with reduced left ventricular ejection fraction.

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