E. (1) sea shell fossils (2) it is made of old ocean floor that got uplifted during collision. 4. At convergent plate boundaries, the volcanic mountain chains that form are called (1) ________ in an ocean-. ocean setting and (2) __________ in an ocean-continent setting.
Poor R wave progression is a vague term used to describe the transition in voltage in the precordial leads of an electrocardiogram (ECG). It is not a diagnosis but simply describes a pattern frequently noted. In a normal individual there is a progressive increase in the magnitude of the voltage in the leads from V1 to V4.
Best Answer: Sinus rhythm is the NORMAL rhythm of the heart. It means that your heart beat is originating from the Sino Atrial node - where it should originate from. Poor r-wave progression means that on the ECG, the chest leads v1-v6 show an atypical pattern of electricity. This is usually associated with an unhealthy heart, perhaps one that has had heart attacks in the past, but it can also be caused by wolf-parkinson-white syndrome, or hypertrophy of the heart.