…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…

…Left to right shunt. Right ventricular dysfunction due to pressure/volume overload is the most common cause. Ebstein's anomaly The prevalence of Ebstein's…

…acromion . The injection site lies 2–3 fingerbreadths (about 5 cm) below the lower border of the acromion , in the middle of the muscle belly…

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

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

…the early stages of aortic stenosis, stroke volume becomes smaller. Reduced stroke volumes and increased resistance in the valve result in compensatory left ventricular hypertrophy…

…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…

…causes of left axis deviation have been excluded. Causes of extreme axis deviation Extreme axis deviation is rare. It is most likely due to misplaced…

…s, provided that other causes of left axis deviation have been excluded. Causes of extreme axis deviation Rare. Most likely due to misplaced limb electrodes…

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…