NUSA 203 Exam 4 With Solution

NUSA 203 Exam 4 With
Solution

Dysrhythmia causes - ANSWER - MI

- Mg or K imbalances

- hypoxia

- drug toxicity

- hypovolemia

- illegal drug use

- stress

- caffeine

- nicotine

- alcohol




V1 lead placement - ANSWER right side of sternum, 4th intercostal space




V2 lead placement - ANSWER left side of sternum, 4th intercostal space

,V3 lead placement - ANSWER between V2 and V4




V4 lead placement - ANSWER left midclavicular line, 5th intercostal space




V5 lead placement - ANSWER left anterior axillary line at same level as V4




V6 lead placement - ANSWER left midaxillary line at same level as V5




ECG strip time length - ANSWER 3 seconds




ECG big box time length - ANSWER 0.20 seconds




ECG small box time length - ANSWER 0.04 seconds




ECG big box voltage - ANSWER 0.5 mV




Normal ECG HR - ANSWER - measured by counting QRS complexes

- 60 - 100 bpm




Normal ECG rhythm - ANSWER - regularity of P waves

, - regularity of QRS complexes




Normal ECG PR interval - ANSWER 0.12 - 0.20 seconds




Normal ECG QRS interval - ANSWER 0.04 - 0.12 seconds




Normal ECG ST segment - ANSWER should be on the isometric line




Normal ECG T wave - ANSWER - consistent shape and height

- peaks or inversions are not abnormal




Normal Sinus Rhythm (NSR) - ANSWER




Normal Sinus Bradycardia - ANSWER




Temporary heart pacing - ANSWER transcutaneous or transvenous




Permanent heart pacing - ANSWER implanted




Demand pacing - ANSWER only fires when HR lower than set threshold