ECG

Question 1

what leads show the anteroseptal region of the heart?

Answer 1

V1-V4

Question 2

what leads show the inferior region of the heart?

Answer 2

II,III and aVF

Question 3

what leads show the anterolateral region of the heart?

Answer 3

V4-V6,I and aVL

Question 4

what leads show the lateral region of the heart?

Answer 4

I, aVL +/- V5-6

Question 5

what leads show the posterior region of the heart?

Answer 5

tall R waves V1-2

Question 6

what coronary artery corresponds to the anteroseptal region of the heart on an ECG?

Answer 6

left anterior descending

Question 7

what coronary artery corresponds to the inferior region of the heart on an ECG?

Answer 7

right coronary

Question 8

what coronary artery corresponds to the anterolateral region of the heart on an ECG?

Answer 8

left anterior descending or left circumflex

Question 9

what coronary artery corresponds to the lateral region of the heart on an ECG?

Answer 9

left circumflex

Question 10

what coronary artery corresponds to the posterior region of the heart on an ECG?

Answer 10

usually left circumflex, also right coronary

Question 11

when depolarisation moves towards the recording electrode what will this look like on the ECG?

Answer 11

upward deflection

Question 12

when depolarisation moves away from the recording electrode what will this look like on the ECG?

Answer 12

downward deflection

Question 13

what does the P wave symbolise?

Answer 13

atrial depolarisation

Question 14

how long is the normal p wave duration?

Answer 14

less than 0.12s

Question 15

what does the QRS complex represent?

Answer 15

ventricular activation or depolarisation

Question 16

what is the normal duration of the QRS complex?

Answer 16

0.1s or less

Question 17

what does the T wave represent?

Answer 17

ventricular repolarisation

Question 18

what does the PR interval reflect?

Answer 18

the time for the SA node impulse to reach the ventricles

Question 19

where does the PR interval start/end?

Answer 19

start of P wave to the start of QRS complex

Question 20

how long is the normal duration of the PR interval?

Answer 20

0.12-0.2secs

Question 21

where is the ST segment?

Answer 21

end of the QRS complex to the start of the T wave

Question 22

where is the QT interval?

Answer 22

start of QRS complex to end of T wave

Question 23

what does the QT interval reflect?

Answer 23

time for ventricular depolarisation and repolarisation

Question 24

what is the normal duration of the QT interval?

Answer 24

0. 44Secs in males

0. 46secs in females

Question 25

what happens during the ST segment?

Answer 25

ventricles contract (systole)

Question 26

what happens during the TP segment?

Answer 26

ventricles relax (diastole)