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.
QRS complexes found in a 6-second portion of the ECG tracing. â¢ The 300, 150, 100, 75, 60, 50 method involves locating an R wave. on a bold line on the ECG paper, then finding the next consecutive. R wave and using the 300, 150, 100, 75, 60, 50 values for. subsequent bold lines to determine the rate. â¢ To use the 1500 method count the number of small squares. between two consecutive R waves and divide 1500 by that number.