CSCT EXAM ACTUAL EXAM QUESTIONS WITH COMPLETE VERIFIED ANSWERS | GUARANTEE PASS

CSCT EXAM ACTUAL EXAM QUESTIONS WITH COMPLETE VERIFIED ANSWERS | GUARANTEE PASS 1. What is the normal PR interval range? - ANSWER 0.12 - 0.20 seconds 2. What is the normal QRS range? - ANSWER 0.08 - 0.12 seconds 3. What information can be detected by the ECG? - ANSWER Acute MIs, injury and ischemia Evaluation of arrhythmias Pathological overload of the heart (hypertrophy) Inflammation of heart's lining (endo/myo/peri - carditis) Assessing ° of secondary cardiac injury in ischemic hd Assessing deterioration of heart's conduction system Effects of antiarrhythmic drugs & other meds Assessing metabolic & electrolyte disturbances Coronary HD related to transient ischemia or coronary artery spasm Assessing artificial pacemaker function 4. What are the limitations of the ECG as a diagnostic tool? - ANSWER Mechanical function of the heart Etiology and pathology of disease Structural & functional impairment CAD related to silent/transient ischemia 5. When should you not change the standardization on an ECG machine? - ANSWER Angina or Chest pain 6. What does 1 small box on graph paper equate to? - ANSWER 0.04 sec or 40 msec horizontally a. mV vertically 7. What is the formula to convert BPM to ms? - ANSWER 60,000 ÷ BPM = milliseconds 60,000 ÷ ms = BPM 8. Criteria for normal sinus rhythm. - ANSWER Upright P wave of sinus origin in I, II and avF Constant P configuration in any lead followed by QRS HR between 60 -100 bpm 9. Multifocal Atrial Tachycardia - ANSWER -HR100bpm (usually 100- 150bpm; may be as high as 250bpm) -Irregularly irregular rhythm w/ varying PP, PR, RR intervals -3 distinct P-wave morphologies in the same lead -Isoelectric baseline b/w P-waves (no flutter waves) -not just a sinus rhythm w/ frequent PACs 10.Junctional Escape Rhythm - ANSWER -junctional rhythm w/ a rate of 40- 60bpm -QRS complexes are typically narrow (120ms) -no relationship b/w QRS complexes and any preceding atrial activity 11.Accelerated Junctional Rhythm - ANSWER -rate will be 60-100bpm -occurs when the rate of an AV junctional pacemaker exceeds that of the sinus node -arises when there is increased automaticity in the AV node coupled w/ decreased automaticity in the sinus node -retrograde P waves may be present and can appear before, during or after the QRS complex 12.What is the name of the formula for the corrected QT interval? - ANSWER Bazett's formula: QT interval / square root of the R-R interval multiplied by 450 ms of the upper limit of normal 13.List the ECG criteria for LVH - ANSWER R or S in limb leads ≥ 20mm S in V1 or V2 ≥ 30 mm R in V5 or V6 ≥ 30 mm Left atrial enlargement in V1 Left axis deviation (-30° to -90°) 14.What is considered within the range of the normal axis? - ANSWER -30° to +90° 15.What is the range of the normal ejection fraction? - ANSWER 55% - 75% 16.Junctional Bradycardia - ANSWER junctional rhythm at a rate of 40bpm