Which strip shows asystole on an EKG?

Asystole is defined as the absence of electrical activity in the heart, leading to no cardiac output. On an EKG, asystole is represented by a flat, straight line, reflecting this complete lack of electrical impulses. This straight line signifies that there are no identifiable waves, complexes, or intervals typically seen in a normal rhythm, such as P waves, QRS complexes, or T waves.

The other patterns described in the choices illustrate various forms of electrical activity. A wavy line could suggest chaotic electrical activity, such as that seen in atrial fibrillation or other arrhythmias. A QRS complex indicates depolarization of the ventricles, which is a sign of electrical activity occurring in the heart. A triangular pattern may suggest a specific type of rhythm or waveform that also indicates some level of cardiac function. In contrast, the straight line clearly indicates a state of asystole, where the heart is not generating any electrical impulses or mechanical contractions.