NHA CET EXAM SCRIPT 2025/2026 QUESTIONS
WITH SOLUTION GRADED A+
✔✔Affects both the atria and the ventricles by increasing heart rate conduction and
irritability - ✔✔Sympathetic Nervous System
✔✔What is a positive holter? - ✔✔one that has recorded abnormalities
✔✔What is a negative holter? - ✔✔A negative holter will have no significant arrhythmias
or ST changes
✔✔Abbreviation for Myocardial infarction - ✔✔M.I.
✔✔Infarction refers to what? - ✔✔To the actual death of the myocardial cells.
✔✔Occurs when there is a decrease in the amount of blood flow to a section of the
heart - ✔✔Ischemia
✔✔Electrical impulses go down the usual pathway but encounter blocks and delays -
✔✔conduction blocks
✔✔Electrical impulses originate from somewhere else other than the sinus node -
✔✔Ectopic Rhythms
✔✔Where electrical flow follows the usual conduction pathway is too fast, too slow, or
irregular... - ✔✔Arrhythmias of Sinus Origin
✔✔Normal Running Speed for an EKG Machine - ✔✔25 mm/sec
✔✔Patients tremors or shaking the wires can produce jittery patterns on the EKG
tracing - ✔✔Somatic tremors
✔✔Somatic tremors, Wandering Baseline, 60-cycle interference, broken recording.. -
✔✔Artifacts
✔✔From J point to the onset of the T wave - ✔✔ST segment
✔✔Line from the end of the p wave to the onset of the QRS complex - ✔✔PR segment
✔✔It should be no more than 0.1 sec. in the limb leads and 0.11 sec in the precordial
leads - ✔✔Normal QRS interval
, ✔✔Represents ventricular depolarization time - ✔✔QRS interval
✔✔Normal interval for PR interval - ✔✔0.12 to 0.20
✔✔P wave plus PR segment - ✔✔P-R interval
✔✔This is the interval between two R waves - ✔✔R-R interval
✔✔Deflection produced by ventricular repolarization - ✔✔T wave
✔✔Atrial Activation - ✔✔P wave
✔✔Several waveforms - ✔✔complex
✔✔Waveform plus segment - ✔✔interval
✔✔Line between two waveforms - ✔✔segment
✔✔What is the tracing on the EKG paper marked by? - ✔✔A stylus using heat/thermal
paper
✔✔What does the vertical axis represent on EKG paper - ✔✔Amplitude measured in
millivolts but expressed in millimeters.
✔✔What does 5mm on EKG paper equal? - ✔✔0.20 seconds
✔✔1mm equals what on EKG paper? - ✔✔0.04 seconds
✔✔graph paper with horizontal and vertical lines at 1-mm intervals. Heavy line appears
every 5 mm - ✔✔The EKG paper
✔✔How many electrodes are placed during a routine EKG? - ✔✔(All answers are
correct:)
1.) 10 producing 12 leads: I, II, III
2.) aVR, aVL, aVF
3. V1-V6
✔✔Ventricular activation - ✔✔QRS Complex,
S wave,
Q wave, R wave
✔✔Represents ventricular depolarization - ✔✔QRS complex
WITH SOLUTION GRADED A+
✔✔Affects both the atria and the ventricles by increasing heart rate conduction and
irritability - ✔✔Sympathetic Nervous System
✔✔What is a positive holter? - ✔✔one that has recorded abnormalities
✔✔What is a negative holter? - ✔✔A negative holter will have no significant arrhythmias
or ST changes
✔✔Abbreviation for Myocardial infarction - ✔✔M.I.
✔✔Infarction refers to what? - ✔✔To the actual death of the myocardial cells.
✔✔Occurs when there is a decrease in the amount of blood flow to a section of the
heart - ✔✔Ischemia
✔✔Electrical impulses go down the usual pathway but encounter blocks and delays -
✔✔conduction blocks
✔✔Electrical impulses originate from somewhere else other than the sinus node -
✔✔Ectopic Rhythms
✔✔Where electrical flow follows the usual conduction pathway is too fast, too slow, or
irregular... - ✔✔Arrhythmias of Sinus Origin
✔✔Normal Running Speed for an EKG Machine - ✔✔25 mm/sec
✔✔Patients tremors or shaking the wires can produce jittery patterns on the EKG
tracing - ✔✔Somatic tremors
✔✔Somatic tremors, Wandering Baseline, 60-cycle interference, broken recording.. -
✔✔Artifacts
✔✔From J point to the onset of the T wave - ✔✔ST segment
✔✔Line from the end of the p wave to the onset of the QRS complex - ✔✔PR segment
✔✔It should be no more than 0.1 sec. in the limb leads and 0.11 sec in the precordial
leads - ✔✔Normal QRS interval
, ✔✔Represents ventricular depolarization time - ✔✔QRS interval
✔✔Normal interval for PR interval - ✔✔0.12 to 0.20
✔✔P wave plus PR segment - ✔✔P-R interval
✔✔This is the interval between two R waves - ✔✔R-R interval
✔✔Deflection produced by ventricular repolarization - ✔✔T wave
✔✔Atrial Activation - ✔✔P wave
✔✔Several waveforms - ✔✔complex
✔✔Waveform plus segment - ✔✔interval
✔✔Line between two waveforms - ✔✔segment
✔✔What is the tracing on the EKG paper marked by? - ✔✔A stylus using heat/thermal
paper
✔✔What does the vertical axis represent on EKG paper - ✔✔Amplitude measured in
millivolts but expressed in millimeters.
✔✔What does 5mm on EKG paper equal? - ✔✔0.20 seconds
✔✔1mm equals what on EKG paper? - ✔✔0.04 seconds
✔✔graph paper with horizontal and vertical lines at 1-mm intervals. Heavy line appears
every 5 mm - ✔✔The EKG paper
✔✔How many electrodes are placed during a routine EKG? - ✔✔(All answers are
correct:)
1.) 10 producing 12 leads: I, II, III
2.) aVR, aVL, aVF
3. V1-V6
✔✔Ventricular activation - ✔✔QRS Complex,
S wave,
Q wave, R wave
✔✔Represents ventricular depolarization - ✔✔QRS complex
