…of the tympanic membrane — including a history of grommets, ear discharge or pain on contact with water. A history of ear surgery in which the…

…of 40 beats per minute. QRS complexes are normal (provided that intraventricular conduction is normal). If the P wave is visible, it is retrograde in…

…Unilateral, foul smelling nasal discharge in a small child is a foreign body until proven otherwise. Contraindications Absolute: that you cannot see the object, or…

…anaesthesia. Placenta praevia or ruptured membranes in pregnancy — a speculum may be used, but not digital examination until the position of the placenta is known…

…components of the conduction system, the heart and the classical ECG waveforms. Figure 1 . The cardiac cycle starts when cells in the sinoatrial node discharge…

…facilitate understanding of this article. As discussed in Chapter 1 the atrioventricular node does not exhibit automaticity, meaning that it does not discharge spontaneous action…

…to hospital discharge is 8.8% and survival to 30 days is 10.7% in out of hospital cardiac arrest ( Yan et al ). The low…

…because discharge of the impulse in the sinoatrial node is not noticeable on surface ECG). Figure 1. Upper tracing shows normal impulse conduction from the…

…diminished). Chronotropic incompetence (inability of the sinoatrial node to adequately increase its automaticity during physical activity). Sinus arrest & sinus pause (intermittent failures to discharge impulses)…

…survival to hospital discharge ( Idris et al ). Duval et al studied 3,643 cases of out of hospital cardiac arrest in the ROC PRIMED trial…