ventricular fibrillation

Question 1

describe the aetiology of ventricular fibrillation

Answer 1

majority - manifestation of underlying ischaemic heart disease

other: cardiomyopathy, electrolyte imbalance and overdoses of cardiotoxic drugs

Question 2

what provokes ventricular fibrillation

Answer 2

usually an ectopic ventricular beat

Question 3

describe the clinical presentation of ventricular fibrillation

Answer 3

patient goes into cardiac arrest

Question 4

what are the investigations indicated in suspected ventricular fibrillation

Answer 4

ECG

Question 5

what are the ECG findings seen in ventricular fibrillation

Answer 5

irregular waveform
no recognisable QRS complexes
random frequency and amplitude
uncoordinated electrical activity

Question 6

is ventricular fibrillation a shockable rhythm

Answer 6

yes

Question 7

management of ventricular fibrillation

Answer 7

short term - cardiac arrest management
long term - ICD

Question 8

what does ventricular fibrillation involve physiologically

Answer 8

very rapid and irregular ventricular activation which has no mechanical effect