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Additional mortality produced by co-existent cerebral and peripheral atherosclerosis in a population with coronary
1New York Life Insurance Company, New York 10010, USA.
Insights
Cerebral and lower extremity atherosclerosis significantly increase mortality in patients with coronary artery disease. The combined presence of both conditions dramatically elevates death rates, highlighting a critical impact on survival.
Area of Science:
- Cardiovascular Medicine
- Vascular Biology
- Epidemiology
Background:
- Coronary artery disease (CAD) is a leading cause of mortality worldwide.
- The impact of co-existing atherosclerosis in other vascular beds on CAD patient survival is not fully understood.
- Cerebral and lower extremity atherosclerosis represent significant vascular comorbidities.
Purpose of the Study:
- To investigate the independent and combined effects of cerebral and lower extremity atherosclerosis on survival in patients with known coronary artery disease.
- To quantify the additional mortality risk associated with these vascular conditions in a CAD cohort.
Main Methods:
- A cohort study design was employed.
- Survival data was analyzed in individuals with known coronary artery disease.
- Statistical analysis was performed to determine mortality ratios and extra death rates.
Main Results:
- Individuals with cerebral atherosclerosis alone showed a 220% mortality ratio and a 27 extra death rate.
- Individuals with lower extremity atherosclerosis alone also exhibited a 220% mortality ratio and a 27 extra death rate.
- The co-existence of both cerebral and lower extremity atherosclerosis resulted in a 410% mortality ratio and a 71 extra death rate, indicating a synergistic negative impact on survival.
Conclusions:
- Cerebral and lower extremity atherosclerosis independently increase mortality risk in patients with coronary artery disease.
- The combined presence of these two conditions significantly amplifies the mortality impact, underscoring the importance of comprehensive vascular assessment in CAD patients.
Abstract:
The effect on survival of cerebral and lower extremity atherosclerosis was investigated in a cohort of individuals with known coronary artery disease. Those with cerebral and lower extremity atherosclerosis each had mortality ratios about 220% and extra death rates about 27. With the co-existence of both impairments the mortality ratio nearly doubled to 410% and the extra death rate increased to 71. In a group of individuals with known coronary artery disease, cerebral and lower extremity atherosclerosis have a major additional mortality impact.