ECG electrocardiogram

Question 1

normal HR

Answer 1

60-100bpm
higher than. 100 at rest= tachycardia
lower than 60 at rest= bradycardia

Question 2

ECG abnormalities: heart block (1st and 3rd degree)

Answer 2

conduction through AV is slowed and length of pr segment rises

fewer qrs waves

1st degree= waves all present, but pr segment longer than normal

3rd degree=complete blockage of signal from atria to ventricles- 30ap/min (sooo slow)

Question 3

ECG abnormalities: ventricular fibrillation

Answer 3

heart muscle no longer depolarizing synchronously, making coordinated pumping impossible

Question 4

p-wave

Answer 4

atrial depolarization
-followed by atrial contraction

Question 5

PR segment

Answer 5

av node delay
atria finish contracting and emptying

Question 6

QRS wave

Answer 6

ventricular depolarization
atrial repolarization also occuring- but covered by the ventricular depolarization event

Question 7

ST segment

Answer 7

all fibres in ventricle are contracted, emptying continues until halfway through T wave

Question 8

T wave

Answer 8

ventrucular repolarization

Question 9

TP segment

Answer 9

atria and vent relaxed (filling vent)