ECG Stimulation threshold As previously discussed, myocardium may be excited by external electrical stimuli that drive the cells to threshold. Stimulation threshold is the minimum…

…which a patient performs progressively increasing external work, usually on a treadmill, while symptoms, a 12 lead ECG, heart rate and blood pressure are monitored…

…action potentials originating in the sinus node, but also by external electrical stimuli that drive the cells to threshold. Any stimulus driving the membrane potential…

…a normal radiograph. Contraindications An open fracture or a wound that needs to be inspected — use a windowed splint or external fixation. Established or impending…

…after balloon angioplasty differs mechanistically from ISR. Balloon angioplasty may result in negative remodelling and reparative arterial constriction. A stent provides a rigid scaffold that…

…principal advantage is tissue penetration, generally allowing assessment several millimetres beyond the lumen and visualization of the external elastic membrane (EEM). IVUS is consequently useful…

…reflex response to posture, venous pooling, or external stimuli. The underlying pathophysiology is rooted in autonomic dysregulation within a structurally normal heart. During an episode…

…VF) and pulseless ventricular tachycardia (VT). The bradyarrhythmias include all bradyarrhythmias, pulse less electrical activity (PEA), and asystole. Bradyarrhythmias are discussed in the chapter Management…

…with the electronics in the pulse generator or dislodgement or fracture of the leads. External causes are less common and include electrolyte disorders, metabolic disorders…

…may be sufficient to resuscitate the individual, especially if an automatic external defibrillator (AED) is available and used appropriately. According to the Swedish Cardiopulmonary Resuscitation…