…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 …

…volume (SV) should be placed between the leaflet tips (1–3 mm axial length of SV) and sweep speed is set to 50 mm/s…

…distinct flow (almost 5 m/s) directed away from the transducer during systole (systole starts at the peak of the R wave on the electrocardiogram)…

…utilized to assess whether there is any residual ischemia or angina pectoris. Patients may undergo repeated stress tests to assess symptoms and signs of ischemia.

…young individuals. The severity of symptoms and presence of high risk arrhythmias on ECG guides the management of non acute or asymptomatic bradyarrhythmia. In patients…

…minute or even invisible spikes (at least in some leads). Pacemaker stimulated beats display wide QRS complexes and a left bundle branch block pattern on…

…instability or a life threatening arrhythmia. Undrained pneumothorax. Facial trauma, facial burns or recent facial surgery that make a seal impossible. Recent surgery on the…

…22 G needle, 20 mL and 50 mL syringes. Therapeutic drainage: a commercial paracentesis set or a catheter over needle, 16–18 G, connected to…

…and sudden: Loss of pulse. Loss of blood pressure. Loss of consciousness. Electromechanical dissociation or pulseless electrical activity despite ongoing sinus rhythm on the ECG…

…In life threatening conditions all contraindications are relative — but they govern which site is chosen. Infection, burns or trauma over the insertion site. Thrombosis or…