…The oesophageal signal is thereby displayed in the V5 channel on the printout. 3. Set the filter: a frequency range of about 15–40 Hz…

…misplaced stimulation artifacts, irregular pacing, etc. Most cases of malfunction are associated with the electronics in the pulse generator or dislodgement or fracture of the…

…stricture or a known diverticulum Relative Recent nasal or pharyngeal surgery Signs that should raise the suspicion of a base of skull fracture: periorbital bruising…

…may be displaced upwards (ST segment elevation) or downwards (ST segment depression). The term ST segment deviation refers to elevation and depression of the ST…

Echocardiography Tricuspid regurgitation The tricuspid valve separates the right ventricle and the right atrium. It normally consists of three leaflets (anterior, posterior and septal leaflet…

…L) — choose the subcutaneous route if possible, otherwise give IM with a fine needle and 5 minutes of compression. Anticoagulant treatment is not in itself…

…the uterus should be manually displaced to the woman's left side (Figure 1). Additional offloading of the vena cava can be accomplished using a…

…the opening of the mitral valve and the left atrium. Recall that velocities (flows) directed away from the transducer are displayed below the baseline and…

…from right anterior (V1) to left lateral (V6), but regrettably, the limb leads are not. Instead, the limb leads are displayed in two groups of…

…a biologically active process. Risk factors for calcification overlap with risk factors for coronary heart disease (atherosclerosis). The average age at diagnosis of aortic stenosis…

…resolution movie. The rate of update is described by the technical term frame rate , which is the number of images ( frames ) displayed per second. High…

…of right axis deviation have been excluded. Causes of left axis deviation Left bundle branch block. Left ventricular hypertrophy. Inferior infarction. Pre excitation. Left anterior…

…of right axis deviation have been excluded. Causes of left axis deviation Left bundle branch block. Left ventricular hypertrophy. Inferior infarction. Pre excitation. Left anterior…

ECG Myocardial ischemia and infarction Pathological Q waves are evidence of myocardial infarction Myocardial infarction – particularly if extensive in size – typically manifests with pathological Q…