Heart failure Flashcards
What is the steps of Cardiac conduction?
SA node–> Internodal pathway–> AV junction–> Bundle of His–>Left or right bundle of branch–> Purkinje fibers
where is the SA (sinoatrial) node?
Right atrium
what is the SA node?
pacemaker of the heart (heart beat begins
Function of AV (atrioventricular junction) junction?
Electrical Conduction Relay Station (receives signal from SA)
what is something that occurs in the AV node?
Delays the impulse slightly before passing it to the ventricles via the Bundle of His.
function of Bundle of His?
role in transmitting electrical impulses from the atria to the ventricles (only connection between atria and ventricles)
L and R bundle branches go to?
RV and LV
Purkinje fibers function?
making sure that the ventricles contract coordinately to pump blood out of heart
SA max BMP?
80-100/min
AV max BMP?
60-80/min
HIS bundle BMP?
40-60 BMP
if one part of conduction (ex. SA) gets damage what happens?
the next (ex. AV) in line takes it place–> slows down heart–> leads to pacemaker
Purkinje fibers max BMP?
40 BMP
what are the common waves in a EKG?
PWRST
what does the p wave represent?
atrial depolarization (contraction)
depolarization is?
Depolarization = Electrical activation → Leads to contraction.
repolarization is?
Repolarization = Electrical reset → Leads to relaxation.
what does the QRS complex waves mean?
Ventricular Depolarization (contraction)
what does the T wave represent?
Ventricular Repolarization (relaxation)
ST segment is the beginning of?
ventricular repolarization
where is atrial repolarization?
behind QRS (need a different view)
atrial repolarization is?
relaxation
