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Ladwig, K.-H. ; Meisinger, C.* ; Hymer, H. ; Wolf, K.* ; Heier, M.* ; von Scheidt, W.* ; Kuch, B.*

Sex and age specific time patterns and long term time trends of pre-hospital delay of patients presenting with acute ST-segment elevation myocardial infarction.

Int. J. Cardiol. 152, 350-355 (2011)

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Prompt initiation of treatment after symptom onset of ST-elevation myocardial infarction (STEMI) is a central goal in limiting myocardial damage because of the time-dependent nature of reperfusion therapies. We examined time patterns and long term time trends of pre-hospital delay time (PHDT) of STEMI patients. PHDT from 3093 STEMI patients derived from the Augsburg Myocardial Infarction Registry (1985-2004) surviving >24h after admission was obtained by a standardized bedside interview. Patients with in-hospital MI (n=140) and resuscitation (n=157) were excluded. Linear regression models were used to examine monthly median PHDT and individual PHDT over time.Female sex was associated with longer PHDT (189 (98-542quartiles) min vs. 154 (85-497) min; p<0.0003). Median PHDT in the youngest male subgroup (25-54 years) was 128 (73-458) min and mounted to 205 (107-600) min in the oldest female subgroup (65-74 years). A minority of 12.4% of patients reached hospital within 1h of delay ranging from 8.7% (in oldest women) to 15.9% (in youngest men). The age-adjusted linear regression model for monthly PHDT revealed no significant change over 20-year time in both sexes. The corresponding average annual percentage change estimates were -0.45 (95% CI: -1.40 to 0.54) for men and -0.08 (95% CI: -1.80 to 1.67) for women. Emergency ambulance use increased over time, however transportation time remained stable.PHDT in STEMI patients is constantly high over a 20-year observation period. Room for improvement especially in older women was evidenced. Preventive strategies with focused efforts on this subgroup are warranted.

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