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ECG MADE EASY EXAM LATEST VERSION -2025/2026- 100+
QUESTIONS AND VERIFIED ANSWERS ALL THE BEST
3 small squares (0.12s)
1 small square represents
0.04s
X occurs during the ST segment
ventricular contraction
exact limits of the ST segment
5 points of the ECG and what they represent
what segment represents ventricular systole
ST
ECG systemic review stages
rate, rhythm (sinus or otherwise?), P, QRS (width), ST, T
T waves are almost always inverted in X, and often inverted in Y
X VR Y V1
QRS max width
end of S wave to beginning of T wave; should be a straight line
Limits of the PR interval (careful) and its physiological meaning
beginning of P to beginning of Q (QRS complex, yes); time take for impulse to
spread from SA node to ventricular muscle
normal PR interval
3 to 5 small squares (120 to 200ms)
, 2
what's this?
limits of the QT interval
beginning of Q to end of T
normal range of QT interval in small boxes; what is the risk if too high?
9-11; risk of Torsades de Pointes (type of ventricular tachycardia)
QT interval correction formula: what is it and why do we need it?
because diastole naturally shortens at faster heart rates
QTc = QT/(sqRR)
measured in seconds
how do you determine the position of the interventricular septum from an ECG?
the V lead whose R and S waves are of equal length
sinus arrhythmia
a sinus rhythm in which the rate varies with respiration, causing an irregular
rhythm; this is normally seen in young people and is not problematic
name 2 serious and 1 normal cause of tachycardia
haemorrhage, thyrotoxicosis, exercise
name the 3 supraventricular rhythms; what do they have in common on ECG?
sinus, atrial, junctional (nodal); normal QRS
in ventricular rhythms, the QRS is X and the T wave is of Y shape
X wide Y abnormal
the secondary sites of spontaneous depolarisation have a X rhythm than the
sinoatrial node
slower
hallmark of atrial escape (though not always present)
ECG MADE EASY EXAM LATEST VERSION -2025/2026- 100+
QUESTIONS AND VERIFIED ANSWERS ALL THE BEST
3 small squares (0.12s)
1 small square represents
0.04s
X occurs during the ST segment
ventricular contraction
exact limits of the ST segment
5 points of the ECG and what they represent
what segment represents ventricular systole
ST
ECG systemic review stages
rate, rhythm (sinus or otherwise?), P, QRS (width), ST, T
T waves are almost always inverted in X, and often inverted in Y
X VR Y V1
QRS max width
end of S wave to beginning of T wave; should be a straight line
Limits of the PR interval (careful) and its physiological meaning
beginning of P to beginning of Q (QRS complex, yes); time take for impulse to
spread from SA node to ventricular muscle
normal PR interval
3 to 5 small squares (120 to 200ms)
, 2
what's this?
limits of the QT interval
beginning of Q to end of T
normal range of QT interval in small boxes; what is the risk if too high?
9-11; risk of Torsades de Pointes (type of ventricular tachycardia)
QT interval correction formula: what is it and why do we need it?
because diastole naturally shortens at faster heart rates
QTc = QT/(sqRR)
measured in seconds
how do you determine the position of the interventricular septum from an ECG?
the V lead whose R and S waves are of equal length
sinus arrhythmia
a sinus rhythm in which the rate varies with respiration, causing an irregular
rhythm; this is normally seen in young people and is not problematic
name 2 serious and 1 normal cause of tachycardia
haemorrhage, thyrotoxicosis, exercise
name the 3 supraventricular rhythms; what do they have in common on ECG?
sinus, atrial, junctional (nodal); normal QRS
in ventricular rhythms, the QRS is X and the T wave is of Y shape
X wide Y abnormal
the secondary sites of spontaneous depolarisation have a X rhythm than the
sinoatrial node
slower
hallmark of atrial escape (though not always present)
