…or a pumice stone to pare down hyperkeratotic lesions. A cone or an otoscope speculum as a shield when treating near the eye or on…

…deliver pacing pulses, sensing (analyzing electrical activity in the heart) and store electrocardiograms. The pacemaker is powered by a lithium battery with a lifespan of…

…wide QRS complexes; do not delay pacing in order to try yet another dose. Chronotropic support is given as an infusion of isoprenaline, adrenaline or…

…and one in the ventricle. Dual chamber systems offer the possibility of sensing and pacing in both the atria and ventricles. Sensing The pacemaker can…

ECG The artificial pacemaker is one of the great medical inventions of the 20th century. Cardiac pacing has evolved from a hazardous experiment in the…

…in left bundle branch block (LBBB), which explains why paced QRS complexes are similar to the QRS morphology during LBBB. Stimulation in other regions of…

…intrinsic rhythm may develop prolonged pauses. Pacing dependent patients therefore require protection against inhibition during the period of anticipated EMI. The perioperative strategy should also…

…and whether left ventricular systolic function is depressed or preserved Whether hypotension is present Whether an accessory pathway is suspected, particularly before administration of digoxin…

…blood pressure and oximetry monitoring, availability of atropine, isoproterenol, or transcutaneous pacing for post shock bradycardia, and use of biphasic defibrillators , which are standard due…

…follows ECG tracings demonstrating each type of failure. Figure 1. Failure to pace. Figure 2. Failure to sense. Atrial pacing occurs after the intrinsic P…