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BACKGROUND Despite clinical and technical advances, acute aortic dissection carries high operative mortality. This study was designed to establish whether this is influenced by institution and surgeon volume. METHODS Outcomes of 5,184 patients (mean age, 60.3 years; 65.9% male) diagnosed with acute aortic dissection from the Nationwide Inpatient Sample(More)
OBJECTIVE The aim of this study was to determine the effect of pulmonary artery catheterization on clinical outcomes after cardiac surgery in higher-risk patients. DESIGN Retrospective national database analysis. SETTING U.S. hospitals. PARTICIPANTS A weighted sample of 2,063,337 patients undergoing cardiac surgery identified from the Nationwide(More)
Large-scale internet services aim to remain highly available and responsive in the presence of unexpected failures. Providing this service often requires monitoring and analyzing tens of millions of measurements per second across a large number of systems, and one particularly effective solution is to store and query such measurements in a time series(More)
OBJECTIVES The objective of this study was to compare the early outcomes of off-pump and on-pump surgeries in high-risk patient groups. METHODS The outcomes of 83,914 high-risk patients undergoing off-pump or on-pump isolated coronary bypass surgery identified from the Nationwide Inpatient Sample from 2005 to 2010 were compared using propensity analysis.(More)
OBJECTIVES The objective of this study was to investigate the impact of bilateral internal mammary artery (BIMA) on early outcomes after coronary artery bypass grafting. DESIGN Retrospective database analysis. SETTING US hospitals. PATIENTS 1 526 360 patients (mean age 65 years, 73% male) from the Nationwide Inpatient Sample from 2002-2008 who(More)
OBJECTIVES The objective of this study was to quantify the impact of heparin-induced thrombocytopenia (HIT) on outcomes after cardiac surgery. DESIGN Retrospective analysis of national database. SETTING United States hospitals. PARTICIPANTS Patients identified from 186,771 discharge records undergoing cardiac surgery from the Nationwide Inpatient(More)
OBJECTIVES The objective of this study was to assess the impact of robotic approaches on outcomes of coronary bypass surgery. DESIGN Retrospective national database analysis. SETTING United States hospitals. PARTICIPANTS A weighted sample of 484,128 patients undergoing isolated coronary artery surgery identified from the Nationwide Inpatient Sample(More)