The Cardiovascular System. 1  Intro to the Heart. 2  Blood Flow of the Heart (Circulation Flow) 3  Myocardium. 4  Conducting System of the Heart (Nervous Impulse Flow) 5  The Four Corners of the Heart. 6  Layers of the Pericardium, Heart Wall and Spiral Arrangement. 7  Function of the Atrioventricular and Semilunar Valves.
Adhering to precise execution standards in the conduct of all PRT activities ensures the development of body management and fundamental movement skills. PROGRESSION. Progression is the systematic increase in the intensity, duration, volume, and difficulty of PRT activities. The proper progression of PRT activities allows the body to positively adapt to the stresses of training. When progression is violated by too rapid an increase in intensity, duration, volume or difficulty the Soldier is unable to adapt to the demands of training.
The PR interval is the time from the onset of the P wave to the start of the QRS complex. It reflects conduction through the AV node. The normal PR interval is between 120 â 200 ms duration (three to five small squares). If the PR interval is > 200 ms, first degree heart block is said to be present.