Telemetry (EXAM 1)Questions 100 Accurate!!

What do the SA & AV nodes contract? - ANSWERSA--AV=atrial contraction AV--bundle of HIS--purkinje fibers=ventricular contraction Normal intervals - ANSWER*memorize these* PR: .12-.2 QRS: .04-.12 QT: .34-.43 BPM when different nodes are in control - ANSWERSA: 60-100 AV: 40-60 HIS-Purkinje: 20-40 How many seconds are the squares worth on ECG paper? - ANSWERsmall square: .04 large square: .20 5 large squares: 1.0 1 strip: 6.0 Questions to ask when reading ECG - ANSWER1. is there a P for every QRS? 2. does it walk out? 3. what are the intervals? 4. what is the rate/rhythm? How do you treat dysrhythmias? - ANSWERbased upon symptoms no symptoms=no treatment Sinus Bradycardia - ANSWER60bpm -walks out -SA node in control -causes: hypoxia, hypothermia, sleep, athletes, meds -symptoms: syncope, chest pain, hypotension, SOB, diaphoresis -treatment: atropine, underlying cause Sinus Tachycardia - ANSWER100bpm -walks out -SA node in control -causes: fever,