Pacemaker Learning Package
Fusion/Pseudo fusion Beats
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- Điều hướng trang này:
- Figure 24
- Electromagnetic Interference (EMI)
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Fusion/Pseudo fusion Beats Spontaneous cardiac depolarization which occurs coincidentally with a paced depolarization. The paced and natural depolarization waveforms collide or fuse, causing distortion of the surface ECG complex. Figure 24: Dual Chamber Temporary Pacing. Operations & Troubleshooting Liverpool Hospital Intensive Care: Learning Packages Intensive Care Unit Pacemaker Learning Package LH_ICU2016_Learning_Package_Pacemaker_Learning_Package 43 | P a g e Over sensing Inhibition of the pacemaker by events the pacemaker should ignore, e.g. EMI, T-waves, and myopotential Causes Inappropriate sensitivity setting Myopotential inhibition EMI T-waves outside of refractory period Dislodged/fractured lead Electromagnetic Interference (EMI) Radiated or conducted energy – either electrical or magnetic which can interfere with the function of the pacemaker in the Demand mode Figure 25: Dual Chamber Temporary Pacing. Operations & Troubleshooting Should have paced EMI Liverpool Hospital Intensive Care: Learning Packages Intensive Care Unit Pacemaker Learning Package LH_ICU2016_Learning_Package_Pacemaker_Learning_Package 44 | P a g e No Output Pacemaker fails to emit stimuli at the programmed intervals There is no atrial output when it should be pacing Figure 26: Dual Chamber Temporary Pacing. Operations & Troubleshooting CAUSES Battery depletion/pacemaker off Over sensing Faulty cable connection Dislodged/fractured lead AP VP AS VP AP AP AP VP VP |