Abstract 16028: Sustained Increase in the Incidence of Acute Cardiovascular Events After the 2011 Northeast Japan Tsunami: A Population Based Study
BACKGROUD: No population based studies to date have reported the long-term effects on the incidence of acute myocardial infarction (AMI) and acute decompensated heart failure (DHF) after a devastating tsunami.
METHODS: A population based AMI and DHF registration study was conducted in the Iwate prefecture 2 years before and 2 years after the 2011 Japan earthquake and tsunami. Clinical records were reviewed at all hospitals within the district and at nearby teaching hospitals. AMI including sudden cardiac death and DHF were then registered according to the MONICA criteria, and the Framingham definition, respectively.
RESULTS: During the 4 year survey period, a total of 1,223 AMI cases (mean age = 74.5) and 1,416 DHF cases (mean age = 80.1) were identified. The standardized incidence ratio (SIR) and 95% CI for AMI and DHF during the disaster year of 2011 and the post disaster year of 2012 were determined respectively from the number of observed cases relative to the number of expected cases calculated by age adjusted incidence rates for two pre disaster years (2009-2010). When the SIR of AMI and DHF were compared between the control area and the tsunami stricken area (Figure), ratios for both AMI and DHF were significantly higher in the tsunami stricken area in the disaster year of 2011(AMI; 1.24, 95% CI 1.08 - 1.42: DHF; 1.58, 95% CI 1.43 - 1.74), and this increase was sustained even in the post disaster year of 2012 (AMI; 1.24, 95% CI 1.08 - 1.43: DHF; 1.28, 95% CI 1.15 - 1.43). However, in the control area with no significant tsunami damage, no such increase was apparent during the disaster year or the post disaster year.
CONCLUSION: After the devastating tsunami, the incidence of AMI and DHF increased significantly and this increase was sustained for more than a year. This suggests that sudden drastic changes in daily life due to devastating natural disasters increase the incidence of acute cardiovascular events in a sustained manner
Author Disclosures: M. Nakamura: None. F. Tanaka: None. M. Honma: None. R. Komi: None.
- © 2014 by American Heart Association, Inc.