Critical Care Exam 1(Dysrhythmias, ABG's, Hemodynamics, Respiratory) with Complete Solutions.

P wave - ANSWER-Depolarization of the atria PR interval - ANSWER--Normal is 0.12 to 0.2 seconds - onset of atrial depolarization until onset of ventricular polarization QRS complex - ANSWER--Normal is 0.06 to 0.11 seconds -Ventricular depolarization -systole T wave - ANSWER--appears after QRS complex - Ventricular repolarization -Spiked T-wave occurs with hyperkalemia U wave - ANSWER-- repolarization of the purkinje fibers - seen in patients with hypokalemia SA node - ANSWER-the pace-maker of the heart; where the impulse conduction of the heart usually starts; located in the top of the right atrium just below superior vena cava *sends impulses 60-100 BPM Normal Sinus Rhythm - ANSWER-Rate is 60-100/ minute Rhythm is regular P wave present PR interval: normal 0.12-0.20 QRS complex:normal