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Chest Pain in the Emergency Department: Diagnostic Pathways

…remains consequential, and historically 2–6% of patients discharged with presumed non ischaemic chest pain were subsequently found to have had an infarction. Pathophysiological Considerations…

Acute vertigo: quick reference for HINTS and differential diagnosis

…but only if the examiner is trained. Brief attacks triggered by the position of the head relative to gravity: perform Dix Hallpike and, if needed…

The ultrasound transducer

…principle of ultrasound imaging and echocardiography. Piezoelectric crystals The ultrasound waves are generated by ceramic crystals exhibiting piezoelectric properties (i.e piezoelectric crystals ). Thousands of…

Physics of myocardial perfusion imaging (SPECT, PET): Radiotracers, perfusion, blood flow and viability

…high spatial and temporal resolution. PET offers higher spatiotemporal quality, as compared with SPECT. Quantification of blood flow using PET Quantitative PET perfusion imaging offers…

Indications and contraindications for myocardial perfusion imaging

…perfusion imaging can determine whether dysfunctional myocardium or myocardium supplied by a diseased vessel, is viable and could benefit from revascularization. Evaluating the success of…

Standard Transthoracic Echocardiogram: Complete Imaging Protocol

…trabeculae and papillary muscles are considered part of the left ventricular cavity. Other dimensions– including atrial dimensions, mitral annulus, aortic annulus, etc –are measured using…

Intravascular Imaging: IVUS and OCT for PCI Optimisation

…assessment of stent expansion and apposition; recognition of edge dissection, tissue prolapse, thrombus, or other acute complications; investigation of restenosis and stent thrombosis. Intravascular imaging…

Other ECG changes in ischemia and infarction

…typical of ischemia (but the sensitivity is low). U wave changes always accompany other ischemic ST T changes. They may occur in both NSTEMI and…

Tissue Doppler (Tissue Velocity Imaging)

…high amplitude. This is due to the high density of myocardium. It follows that myocardium generates reflections with high amplitude and low Doppler shift. To…

Immediate Management of Type A and Type B Aortic Dissection

…follow cardiac surgery, coronary angiography or other invasive procedures, and affected patients may be relatively painless compared with those with spontaneous dissection. Clinical manifestations may…

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