freeÂ·form. adj. 1. Having or characterized by a usually flowing asymmetric shape or outline: freeform sculpture. 2. Characterized by an unconventional or variable form: their own freeform teaching methods.freeâ²formâ² adv.reeÂ·form. adj. 1. Having or characterized by a usually flowing asymmetric shape or outline: freeform sculpture. 2. Characterized by an unconventional or variable form: their own freeform teaching methods.
SCA is a sudden and unexpected pulseless condition attributed to cessation of cardiac mechanical activity. It is usually caused by ventricular fibrillation, an abnormality in the heartâs electrical system. When SCA occurs, blood stops flowing to the brain, the heart, and the rest of the body, and the person collapses.
In general, SCA is a leading cause of death in adults in the U.S., resulting in an estimated >200,000 to 450,000 deaths each year, and accounts for 50% of all cardiovascular deaths. This wide range is a result of reporting differences for SCA and a lack of consistent definitions and epidemiologic methods.