Increased current density is expected with what type of lead feature? Correct Answer Small tip (cathode) surface area ATP before charge or ATP during charge? Correct Answer ATP DURING charge What would cause a more significant drain on battery charge. Correct Answer Conductivity or Refractoriness The ventriculoatrial conduction time of a pacemaker patient with a typical endless-loop-tachycardia may be calculated by which equation? Correct Answer (upper rate limit interval) - ( AV delay + PVARP) ?įor treatment of arrhythmias, most drugs work by altering _ or _. What phase of the action potential correlates to relative refractory period? Correct Answer 3 Which electrode material is most likely to result in higher pacing thresholds and higher degree of polarization? Correct Answer Elgiloy Not sure why the book says that PVCs are the most common cause, perhaps because bipolar leads have made Crosstalk such a rare-occurring issue now. Ventricular safety standby is a feature designed to avoid the inappropriate inhibition of V-pacing due to crosstalk over sensing of an Ap event on the ventricular EGM. What is the most common cause of safety pacing or "ventricular safety standby?" Correct Answer Ventricular Ectopy Cracking (ESC) Correct Answer ePTFE and 80A polyurethane What lead insulation materials are known for reducing fibroblast in growth and susceptibility to Metal-ion induced oxidation (MIO) and Environmental Stress.
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