What condition does sudden cardiac arrest typically result from?

Sudden cardiac arrest typically results from an abnormal heart rhythm, known as arrhythmia. When the heart's electrical system malfunctions, it can lead to chaotic heartbeats that prevent the heart from effectively pumping blood. This condition, often referred to as ventricular fibrillation or pulseless ventricular tachycardia, disrupts the normal circulation of blood, leading to a lack of oxygen supply to vital organs, especially the brain.

Understanding that sudden cardiac arrest is primarily related to issues in the heart's electrical activity is essential. While conditions like blood flow blockage can lead to a heart attack, they are not the direct cause of sudden cardiac arrest itself. In contrast, a cerebral hemorrhage and high blood pressure do not typically result in sudden cardiac arrest; rather, they pertain to other medical emergencies. This highlights the critical importance of recognizing abnormal heart rhythms in the context of sudden cardiac arrest during Basic Life Support training.