Final answer:
The EKG described, with an expected P-wave, QRS complex, and T-wave configuration in five complete cardiac cycles over six seconds, indicates a Normal sinus rhythm.
Step-by-step explanation:
The question involves interpreting an EKG tracing to determine the cardiac rhythm. If the EKG shows an expected P-wave, QRS complex, and T-wave configuration with five complete cardiac cycles on a six-second strip, the assistant should recognize that this represents Normal sinus rhythm. In a Normal sinus rhythm, each cardiac cycle includes a P wave followed by a QRS complex and then a T wave, reflecting the orderly depolarization and repolarization of the atria and ventricles. Other rhythms such as atrial fibrillation would show an irregular rhythm and absence of distinct P waves, ventricular tachycardia would present with an abnormal shape of the QRS complex, and heart block would exhibit a lack of correlation between atrial activity (the P wave) and ventricular activity (the QRS complex). Since the patient's EKG is described as having the expected configuration and rate, it indicates Normal sinus rhythm.