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.
Accelerated Junctional Rhythm. 1  Rate: 60-100 bpm. 2  Rhythm: Regular. 3  P Waves: Absent, inverted or after the QRS.  PR Intervals: Not measurable, unless P wave is inverted and 1  present. R-R Intervals: Equal.  QRS Complexes: Normal and after each inverted P wave, if present.