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Assessment of Pacemaker Malfunction

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

Basic cardiac pacing, pacemaker functions and settings

…delivered by the pulse generator can be calculated as follows: I = V/R Given that voltage (V) is constant and battery depletion must be…

Components and construction of a pacemaker

…consist of an implantable pulse generator (IPG) , which contains the electronics, a battery , and one or two leads . The pulse generator generates the electric current…

Perioperative Management of Patients with Cardiac Implantable Electronic Devices

…interrogation and reprogramming are warranted in higher risk circumstances, particularly for pacing dependent patients, patients with CRT, and ICD recipients undergoing procedures likely to generate…

Technical aspects of the ultrasound image

…image are drawn with varying shades of one color (usually gray). This is possible because the vibrations in the piezoelectric crystals, and thus the electric…

The ultrasound transducer

…a piezoelectric crystal, it starts to vibrate and these vibrations generate sound waves with frequencies between 1.5 and 8 MHz (i.e ultrasound). Thus…

🟠 Nitroprusside

…pressure control. Mechanism of action Nitroprusside provides nitric oxide (NO) that induces vasodilatation of both arterioles and veins via generation of cyclic GMP, which then…

High-Sensitivity Troponin: 0/1-Hour Rule-In and Rule-Out Algorithms

…approximately 20–50%. Their greater analytical sensitivity improves diagnostic accuracy and negative predictive value in patients with suspected acute coronary syndrome (ACS). Cardiac troponin is…

Ectopic atrial rhythm (EAT), atrial tachycardia (AT) & multifocal atrial tachycardia (MAT)

…response. The ECG in ectopic atrial rhythm and atrial tachycardia A regular rhythm with P waves that differ in contour from sinus P waves. If…

Physics of ultrasound

…mass), second (time), ampere (electric current) and Kelvin (temperature). This system is recommended globally. Amplitude Amplitude describes the strength of the sound waves, which corresponds…

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