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MCA 3 exam 1 Questions and Correct
Answers/ Latest Update / Already Graded
P wave normal value?
Ans: 0.11 sec
PR interval normal value?
Ans: 0.12-0.20 sec
ST segment should be?
Ans: Isoelectric (flat)
QRS normal value?
Ans: 0.06-0.10 sec
QT interval normal value
Ans: O.33-0.43 sec
each tiny EKG box is how many seconds?
Ans: 0.04 seconds
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each big box is how many seconds?
Ans: 0.2 seconds
How to calculate heart rate from a 6 second EKG strip?
Ans: # of R waves x 10
What causes a peaked T wave?
Ans: Hyperkalemia
What is the order of Drugs to treat Hyperkalemia?
Ans: 1. Insulin (Regular IV) plus Dextrose (Insulin shifts
potassium into cells)
2. Calcium gluconate (prevents K+ from leaving blood stream)
3. Albuterol (beta agonist; receptors in Pancreas increase
Insulin production)
4. Sodium Bicarbonate (to raise blood pH and shift extracellular
potassium into cells)
5. Kayexalate/ Sodium Polystyrene (laxative, less K+
absorption)
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Assessment of Cardiac Rhythm steps?
Ans: 1. P wave present? Up or inverted? 1 for every QRS or
more? Any Atrial Flutter or Atrial Fibrillation waves present?
2. Atrial rhythm regular or irregular
3. Calculate atrial rate
4. Measure PR interval. Normal or prolonged?
5. Evaluate ventricular rhythm. Regular or irregular
6. Calculate ventricular rate
7. Measure duration of QRS complex. Normal or prolonged?
8. Assess the ST segment. Flat? elevated? depressed?
9. Measure QT interval. Normal or depressed?
10. Note T wave. Upright or inverted?
Treatment for Bradycardia?
Ans: IV Atropine
Dopamine
Epinephrine
Pacemaker
Dosing of Atropine?
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Ans: 0.5 mg per dose, every 3 to 5 mins; Max 3mg
Symptomatic Bradycardia symptoms?
Ans: Pale skin, hypotension, weakness, chest pain, di iness,
syncope, SOB, confusionzz
Treatments for Sinus Tachycardia?
Ans: Treat Underlying Cause
IVF
Beta-Blockers
Calcium Channel blockers (ex: Diltiazem)
Synchronized cardioversion
Rate for SVT?
Ans: 151-220 bpm
Treatments for SVT?
Ans: Vagal maneuvers (such as baring down)
IV Adenosine
Synchronized cardioversion
All rights reserved © 2025/ 2026 |
MCA 3 exam 1 Questions and Correct
Answers/ Latest Update / Already Graded
P wave normal value?
Ans: 0.11 sec
PR interval normal value?
Ans: 0.12-0.20 sec
ST segment should be?
Ans: Isoelectric (flat)
QRS normal value?
Ans: 0.06-0.10 sec
QT interval normal value
Ans: O.33-0.43 sec
each tiny EKG box is how many seconds?
Ans: 0.04 seconds
All rights reserved © 2025/ 2026 |
, Page |2
each big box is how many seconds?
Ans: 0.2 seconds
How to calculate heart rate from a 6 second EKG strip?
Ans: # of R waves x 10
What causes a peaked T wave?
Ans: Hyperkalemia
What is the order of Drugs to treat Hyperkalemia?
Ans: 1. Insulin (Regular IV) plus Dextrose (Insulin shifts
potassium into cells)
2. Calcium gluconate (prevents K+ from leaving blood stream)
3. Albuterol (beta agonist; receptors in Pancreas increase
Insulin production)
4. Sodium Bicarbonate (to raise blood pH and shift extracellular
potassium into cells)
5. Kayexalate/ Sodium Polystyrene (laxative, less K+
absorption)
All rights reserved © 2025/ 2026 |
, Page |3
Assessment of Cardiac Rhythm steps?
Ans: 1. P wave present? Up or inverted? 1 for every QRS or
more? Any Atrial Flutter or Atrial Fibrillation waves present?
2. Atrial rhythm regular or irregular
3. Calculate atrial rate
4. Measure PR interval. Normal or prolonged?
5. Evaluate ventricular rhythm. Regular or irregular
6. Calculate ventricular rate
7. Measure duration of QRS complex. Normal or prolonged?
8. Assess the ST segment. Flat? elevated? depressed?
9. Measure QT interval. Normal or depressed?
10. Note T wave. Upright or inverted?
Treatment for Bradycardia?
Ans: IV Atropine
Dopamine
Epinephrine
Pacemaker
Dosing of Atropine?
All rights reserved © 2025/ 2026 |
, Page |4
Ans: 0.5 mg per dose, every 3 to 5 mins; Max 3mg
Symptomatic Bradycardia symptoms?
Ans: Pale skin, hypotension, weakness, chest pain, di iness,
syncope, SOB, confusionzz
Treatments for Sinus Tachycardia?
Ans: Treat Underlying Cause
IVF
Beta-Blockers
Calcium Channel blockers (ex: Diltiazem)
Synchronized cardioversion
Rate for SVT?
Ans: 151-220 bpm
Treatments for SVT?
Ans: Vagal maneuvers (such as baring down)
IV Adenosine
Synchronized cardioversion
All rights reserved © 2025/ 2026 |
