WJCD  Vol.4 No.10 , September 2014
Pathologic Q Waves and Prolonged QTc Time in Preoperative ECG Are Predictive for Perioperative Cardiovascular Events
ABSTRACT
Aims: The value of ECG in the perioperative risk stratification under modern treatment options is uncertain. The main objective of the present analysis was to determine the usefulness of a pre-operative ECG derivation for evaluating the risk of perioperative morbidity and mortality. Methods: We performed a secondary analysis of the prospective, international, multicenter, observational “No-Risk” Study (N-terminal B-type natriuretic peptide [NT-proBNP] for the assessment of the perioperative cardiac risk after major noncardiac surgery) to determine the prognostic value of 12-lead ECG. Inclusion criteria were age >55 years and at least one of the following cardiovascular risk factors: arterial hypertension, diabetes mellitus, dyslipidemia, active smoking, and family history positive for coronary heart disease. The combined primary endpoint included total mortality, acute myocardial infarction (NSTEMI and STEMI), cardiopulmonary resuscitation, heart failure, and asystole or ventricular fibrillation during hospitalization. ECGs from 616 patients enrolled from 2006 to 2009 prior to noncardiac surgery in the No-Risk Study were analyzed. Results: The mean age was 67.6 (±8.1) years; 300 (48.7%) patients were male. Fourteen (2.3%) patients suffered from the combined primary endpoint while in the hospital. In Kaplan-Meier analyses, a pathologic Q wave and QTc > 500 ms were significantly related to the incidence of the primary endpoint (p < 0.001, p = 0.042, respectively), whereas other ECG parameters such as LBBB, RBBB, PQ interval, QRS interval, and others were not related to worse in-hospital outcome. Conclusion: The 12-lead ECG is still an important diagnostic tool for perioperative risk assessment of cardiovascular events in noncardiac surgery in patients at risk.

Cite this paper
Wolters, T. , Weber, M. , Neumann, T. , Strauß, H. , Luchner, A. , Seeberger, M. , Mueller, C. , Liebetrau, C. , Apostolovic, S. , Jankovic, R. , Bankovic, D. , Jovic, M. , Mitrovic, V. , Nef, H. , Mollmann, H. , Werdan, K. , Hamm, C. , Schlitt, A. (2014) Pathologic Q Waves and Prolonged QTc Time in Preoperative ECG Are Predictive for Perioperative Cardiovascular Events. World Journal of Cardiovascular Diseases, 4, 498-509. doi: 10.4236/wjcd.2014.410060.
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