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Seasonality of myocardial infarction (MI) has been recognized. However temperature variability alone may not explain this occurrence. This study was done to determine if other weather variables are associated with an increased incidence of hospital admissions for MI.
Retrospective analysis of 266 patients admitted to various hospitals in Lackawanna County, Pennsylvania was done. The data was obtained from the Blue Cross Blue Shield database for hospital patients with a discharge DRG code of MI from October 2009 to September 2010 Weather variables including temperature, humidity, wind, barometric pressure, wind speed, and dew point were recorded from wunderground.com. Average daily value of weather variables on the days of patient admission with MI was compared with the same parameters on the days where no MI was reported. Standard definitions of seasons were used.
MI clustered during the fall and winter as compared to spring and summer. Univariate and multivariate analysis of environmental factors like humidity (P=0.47), barometric pressure (P=0.95), dew point (P=0.09) and wind speed (P=0.20) showed no correlation with MI admission rates.
Admissions for MI demonstrate seasonal variation with the peaks occurring during winter and nadir during summer. Barometric pressure, dew point, humidity and wind speed had no correlation with MI admissions
Poster Sessions, Expo North
Saturday, March 09, 2013, 10:00 a.m.-10:45 a.m.
Session Title: Stress, Coronary Spasm and AMI: Lessons from Japan, New Orleans, Greece
Abstract Category: 1. Acute Coronary Syndromes: Clinical
Presentation Number: 1130-214
- 2013 American College of Cardiology Foundation