CARDIAC ARRHYTHMIAS

Question 1

Tachyarrhythmias

Answer 1

FAST
atrial fib
ventricular tachycardia

Question 2

bradyarrythmias

Answer 2

SLOW
Heart block - no conduction
Drug induced

Question 3

Atrial fib on ECG

Answer 3

Narrow QRS
No P wave
irregular pulse

Question 4

Heart block on ECG

Answer 4

Prolonged P-Q interval

Question 5

What do cardiac pacemakers treat

Answer 5

Bradyarrythmias
If pulse drops - it activates muscle causing ventricular contraction

Question 6

theoretical risk of pacemaker in dental setting

Answer 6

electrical interference with dental equipment - causes circuit to shut down

Question 7

what else can be places with pacemaker in pts with unstable cardiac rythyms/ HR

Answer 7

Implanted defib - uses low energy pulse to recoordinate pulse

Question 8

Sinus rythm

Answer 8

normal rythm - 3 distinct waves on ECG

P wave - atrial depolarisation
QRS complex - ventricular depolarisation
T wave - ventricular repolarisation

Question 9

What diagnosis ischaemic and infarctive changes on ECG

Answer 9

ST segment

Question 10

what wave increases after an MI

Answer 10

Q wave

Question 11

when would ventricular fib occur?

Answer 11

heart attack
electrocution
long QT syndrome (drugs)
Wolf-parkinson-white syndrom

Question 12

ventricular fib

Answer 12

no emptying of ventricle

Question 13

tx ventricular fib

Answer 13

defib
implanted defibs in risk cases