ECG Flashcards
what leads show the anteroseptal region of the heart?
V1-V4
what leads show the inferior region of the heart?
II,III and aVF
what leads show the anterolateral region of the heart?
V4-V6,I and aVL
what leads show the lateral region of the heart?
I, aVL +/- V5-6
what leads show the posterior region of the heart?
tall R waves V1-2
what coronary artery corresponds to the anteroseptal region of the heart on an ECG?
left anterior descending
what coronary artery corresponds to the inferior region of the heart on an ECG?
right coronary
what coronary artery corresponds to the anterolateral region of the heart on an ECG?
left anterior descending or left circumflex
what coronary artery corresponds to the lateral region of the heart on an ECG?
left circumflex
what coronary artery corresponds to the posterior region of the heart on an ECG?
usually left circumflex, also right coronary
when depolarisation moves towards the recording electrode what will this look like on the ECG?
upward deflection
when depolarisation moves away from the recording electrode what will this look like on the ECG?
downward deflection
what does the P wave symbolise?
atrial depolarisation
how long is the normal p wave duration?
less than 0.12s
what does the QRS complex represent?
ventricular activation or depolarisation
what is the normal duration of the QRS complex?
0.1s or less
what does the T wave represent?
ventricular repolarisation
what does the PR interval reflect?
the time for the SA node impulse to reach the ventricles
where does the PR interval start/end?
start of P wave to the start of QRS complex
how long is the normal duration of the PR interval?
0.12-0.2secs
where is the ST segment?
end of the QRS complex to the start of the T wave
where is the QT interval?
start of QRS complex to end of T wave
what does the QT interval reflect?
time for ventricular depolarisation and repolarisation
what is the normal duration of the QT interval?
- 44Secs in males
0. 46secs in females
