6) Pacemaker Rhythms
how Pacemaker is attached: Atrial Pacemaker :
o
attached to right atria
Spike
·
occurs wip-wave
Notes: Ventricular Pacemaker :
·
Spike indicates Pacemaker
·
inserted into
right ventricle
·
Permanent are implanted to treat
·
impulse vent depolarization
.
patients W/ Symptomatic bradycardia Spike is at beginning of QRS
or complete heart block
·
Pacemakers now have an implantable
Cardioverter defibrillator (ICD) in
them to treat tachydysrhythmias
Artificial Pacemaker rhythm:
AV Sequential pacemaker "dual Chamber" :
Battery failure leads in both right
·
: atria and ventricle
·
·
Spikes decrease in amplitude Spike at p-wave and QRS
·
rate slows down
·
dire emergency
Runaway Pacemaker :
·
Pacemaker begins shorting
Failure to capture :
Undersensing: leads
·
become displaced ,
not in contact w/ muscle
"Spikes but aren't always followed
·
Sensing device fails natural/implant
,
occur
by QRS
Pacemaker may compete
, Notes:
7) Heart Blocks
First degree heart block :
·
blockade in ·
most
electrical
pathway common ,
results from an extensive
delay of the AV node
o
PR interval is than
longer normal
·
can be caused betalcalcium blockers
by or
aligoxin
Second degree (mobitz 1) :
attempt to fire QRS fails
·
,
·
two total p-waves
·
atrial rate : reg/ventricular : irregular
Second degree (mobitz III. :
·
indicates an increased risk for
third degree
·
three total p-waves
·
atrial rhythm is
regular
Third degree (completel:
·
Atria and ventricles are independent
of one another
lethal dysrhythmia
·
lead to
may ,
asystole
·
PR intervals are variable
how Pacemaker is attached: Atrial Pacemaker :
o
attached to right atria
Spike
·
occurs wip-wave
Notes: Ventricular Pacemaker :
·
Spike indicates Pacemaker
·
inserted into
right ventricle
·
Permanent are implanted to treat
·
impulse vent depolarization
.
patients W/ Symptomatic bradycardia Spike is at beginning of QRS
or complete heart block
·
Pacemakers now have an implantable
Cardioverter defibrillator (ICD) in
them to treat tachydysrhythmias
Artificial Pacemaker rhythm:
AV Sequential pacemaker "dual Chamber" :
Battery failure leads in both right
·
: atria and ventricle
·
·
Spikes decrease in amplitude Spike at p-wave and QRS
·
rate slows down
·
dire emergency
Runaway Pacemaker :
·
Pacemaker begins shorting
Failure to capture :
Undersensing: leads
·
become displaced ,
not in contact w/ muscle
"Spikes but aren't always followed
·
Sensing device fails natural/implant
,
occur
by QRS
Pacemaker may compete
, Notes:
7) Heart Blocks
First degree heart block :
·
blockade in ·
most
electrical
pathway common ,
results from an extensive
delay of the AV node
o
PR interval is than
longer normal
·
can be caused betalcalcium blockers
by or
aligoxin
Second degree (mobitz 1) :
attempt to fire QRS fails
·
,
·
two total p-waves
·
atrial rate : reg/ventricular : irregular
Second degree (mobitz III. :
·
indicates an increased risk for
third degree
·
three total p-waves
·
atrial rhythm is
regular
Third degree (completel:
·
Atria and ventricles are independent
of one another
lethal dysrhythmia
·
lead to
may ,
asystole
·
PR intervals are variable
