QS Study

Stokes Adams syndrome: The Purkinje system does not begin to emit its intrinsic rhythmical impulses until 5 to 30 seconds later after sudden AV conduction block, during these 5 to 10 seconds, the ventricles fail to pump blood and the person faints after the first 4 to 5 second because lack of blood flow to the brain. This delayed pick up of the heartbeat is called stokes – Adams syndrome. In this situation, the usual heartbeat passing from the upper chambers of the heart to the lower chambers is interrupted. This result in a situation called a “heart block.” When a heart block occurs, the heart rate typically slows significantly. This can reason insufficient blood flow to the brain and result in fainting.

Fig: Stokes Adams Syndrome

Cause: Before sudden AV bundle blockage, the Purkinje fibers had been overdriven by the rapid sinus impulses and consequently; are in a suppressed state resulting in stokes – Adams syndrome. The attacks are caused by any temporary lack of cardiac output.

Treatment is permanent pacemaker implantation as no medical therapy exists to reverse the inherent cardiac conduction pathology.