##### Medicine: Rapid Interpretation Rate

what normally sets the rate of the heart

SA node

wher eis the SA node

posterior wall of right atrium

what can take over if the SA node is not working properly

potential pacemakers (ectopic)

what is the heart rate of the Ectopic pacemakers

75

if the AV node does not receive any signal from the SA node, what will it do

act as idionodal pacemaker

how many beats per minute will the AV node churn out if it is an idionodal pacemakre

60 bpm

can the ventricular pacemakers also set a HR

yes

what are the potential ventricular pacemaker HRs

30-40 bpm

what would the potential ventricular pacemaker beat be called

idioventricular rate

how fast can the heart beat at in emergency situations

150-250 bpm

can the atrial and ventricular ectopic voci and AV node beat as fast as the SA node during emergencies

yes

what is denoted as sinus tachycardia

rate over 100 bpm

what is denoted as sinus bradycardia

lower than 60 bpm

how do you quickly calculate HR from looking at an ECG

find R wave on heavy black line

count 300, 150, 100 for each next heavy black line, then 75, 60, 50 and find the next R wave

how far away is the distance between heavy black lines

1/300 of minute or 1/5 of a second

how would you calculate heart rate in bradycardia

look for small vertical marks at 3 second intervals on top of ECG

find 6 second strip and count how many R to R cycles are within that and then multiply by 10