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pacemaker codes 1) chamber paced: A, V, D
2) chamber sensed: A, V, D, O
3) response to sensing: I (inhibit - demand), T (trigger), D, O
sensitivity aka sight
0.5 - 20 mV
ability to sense intrinsic cardiac activity
undersensing spikes inappropriately
pacemaker doesn't sense cardiac activity so it discharges an impulse regardless of pt's own
rhythm
*undersensing is over pacing*
tx: lower mV
oversensing no spikes where there should be
inhibition of the pacemaker by events the pacemaker should ignore
*oversensing is under pacing*
tx: raise mV
capture immediate depolarization of cardiac muscle following an electrical stimulus
loss of capture spikes w/ no mechanical capture
not enough zap to make the heart squeeze
tx: raise mA (output), check connections
epicardial pacing care black wires have electricity & red is dead (ground wire)
pacemaker codes 1) chamber paced: A, V, D
2) chamber sensed: A, V, D, O
3) response to sensing: I (inhibit - demand), T (trigger), D, O
sensitivity aka sight
0.5 - 20 mV
ability to sense intrinsic cardiac activity
undersensing spikes inappropriately
pacemaker doesn't sense cardiac activity so it discharges an impulse regardless of pt's own
rhythm
*undersensing is over pacing*
tx: lower mV
oversensing no spikes where there should be
inhibition of the pacemaker by events the pacemaker should ignore
*oversensing is under pacing*
tx: raise mV
capture immediate depolarization of cardiac muscle following an electrical stimulus
loss of capture spikes w/ no mechanical capture
not enough zap to make the heart squeeze
tx: raise mA (output), check connections
epicardial pacing care black wires have electricity & red is dead (ground wire)
