Analytical, Diagnostic and Therapeutic Techniques and Equipment Commons^™

Real-World Relevance Of Manual Electrocardiography Qt Interval Measurement, Satish Velagapudi, Zahra Nur Khaled, Bilal Omery, Firas Zahwe, Michael Anigbogu, Sarah Zukkoor, Indrajit Choudhuri

Aurora Cardiology Fellows

Background: Electrocardiography (ECG) QT interval (QTI) prolongation independently predicts sudden death. Hospitalized patients are commonly exposed to multiple QT-prolonging drugs, and manual measurement of ECG QTI based on identifying the intersection of isoelectricity with the tangent to the terminal phase T-wave slope (QTTTT) is advocated due to inaccuracies in automated detection algorithms that may imprecisely identify QT duration.

Purpose: We evaluated the performance of QTTTT compared to a standard automated (12SL, GE Healthcare) method (QT-12SL).

Methods: Consecutively obtained ECGs of 250 hospitalized patients were reviewed. The QTI in leads II, aVR, V5 and V6 determined by QT-12SL and QTTTT were …

Clinical Outcomes After Drug-Eluting Stents Versus Coronary Artery Bypass Surgery In High Surgical Risk Patients With Left Main Or Three-Vessel Coronary Artery Disease, Tonga Nfor, Kambiz Shetabi, Wael Hassan, Quinta Nfor, Jayant Khitha, Anjan Gupta, Tanvir Bajwa, Suhail Allaqaband

Aurora Cardiology Fellows

Purpose Previous studies comparing percutaneous coronary intervention (PCI) with coronary artery bypass graft surgery (CABG) in patients with unprotected left main or three-vessel coronary artery disease (LM-3VD) have excluded patients at high surgical risk. We compared clinical outcomes after PCI with drug-eluting stents to CABG in high surgical risk patients with LM-3VD. Methods Patients with symptomatic LM-3VD who had Society of Thoracic Surgeons (STS)-predicted operative mortality >5% and were undergoing either PCI with drug-eluting stents or CABG at a tertiary care center from January 2009 to December 2010 were enrolled in this nonrandomized prospective study. Results Mean STS score was …