Sudden Cardiac Arrest

Posted by e-Medical PPT Tuesday, September 25, 2012
Sudden Cardiac Arrest (SCA)
SCA claims an estimated 325,000 lives each year
 1,000 lives every day, one life every two minutes
SCA accounts for half of all cardiac-related deaths
Over half of SCA victims have no prior symptoms
Survival requires emergency medical intervention and defibrillation within the first minutes following arrest
The survival rate is as high as 90 percent if treatment is initiated within the first minutes following arrest
An estimated 95 percent of SCA victims die before they reach a hospital or other source of emergency help
85-90 percent of SCAs are actually the first arrhythmic event a patient experiences
Death from SCA can frequently be predicted and prevented by identifying individuals at high risk and intervening

What Causes SCA?
Ventricular tachycardia
Ventricular fibrillation
Hypertrophic cardiomyopathy
Inherited and acquired electrical diseases, e.g. Long QT syndromes 
Congenital anomalous coronary artery
Reduced Ejection Fraction

Risk Factors
High-risk patient populations have been identified:
Prior Sudden Cardiac Arrest
Prior Myocardial Infarction
Heart Failure (Class II to IV)
Ejection Fraction less than 40%
Family History of Sudden Cardiac Arrest

Additional risk factors include:
Recurrent unexplained syncope
Idiopathic cardiomyopathy with syncope or VT
Hypertrophic cardiomyopathy with syncope or VT
Right ventricular dysplasia
Long-QT syndrome

SCA and Coronary Heart Disease
An estimated 13 million people had CHD in the U.S. in 20021
Sudden death was the first manifestation of coronary heart disease in 50% of men and 63% of women1
CHD accounts for at least 80% of sudden cardiac deaths in Western cultures
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