Final answer:
Whenever the criteria for BBB have been met and Lead V1 displays an rSR pattern, you should suspect a right bundle branch block (RBBB).
Step-by-step explanation:
Whenever the criteria for BBB (bundle branch block) have been met and Lead V1 displays an rSR pattern, you should suspect a right bundle branch block (RBBB).
Bundle branch block occurs when there is a delay or blockage in one of the electrical pathways in the heart. In a right bundle branch block, the electrical impulse is delayed or blocked in the right bundle branch.
The rSR pattern in Lead V1 is a characteristic ECG finding in RBBB. The initial R wave represents the delayed impulse in the right bundle branch, followed by an S wave due to delayed activation of the left ventricle, and then another R wave due to activation of the right ventricle. This pattern can help differentiate RBBB from other bundle branch blocks.