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Stroke Volume, VTI (Velocity Time Integral) & Cardiac Output

…diameter/2 ), and velocity is measured by means of Doppler (Figure 1). Figure 1. Calculating flow through a cylinder. Velocity Time Integral (VTI, stroke distance)…

The electrical axis of the heart (ECG axis)

…axis of the heart Although often ignored, assessment of the electrical axis is an integral part of ECG interpretation. The electrical axis reflects the average…

The electrical axis of the heart (heart axis): ECG & physiology

…heart (heart axis) Although often ignored, assessment of the electrical axis is an integral part of ECG interpretation. The electrical axis reflects the average direction…

Regional Myocardial Contractile Function: Wall Motion Abnormalities

…regional wall motion is an integral aspect of virtually every echocardiographic examination. Wall motion is assessed in each segment of the left ventricle (Figure 1…

The Continuity Equation (The Principle of Continuity)

…Out As previously discussed, stroke volume is usually calculated by measuring area and VTI (velocity time integral) in the LVOT (left ventricular outflow tract). However…

🟠 Calculating Shunt Fraction (Qp/Qs) Using Echocardiography

…we outline the methodology and clinical applications of shunt fraction calculation. Echocardiographic Calculation of Qp/Qs 1. Measurement of Left Ventricular Outflow Tract (LVOT) Diameter…

Cardiac Rehabilitation After Myocardial Infarction

…smoking cessation, blood pressure and lipid management, and diabetes care are therefore integral rather than optional components. Psychological and social factors also influence prognosis. Major…

Assessing left ventricular systolic function

…blood pumped from the left ventricle into the aorta during systole. It is easily calculated by measuring VTI (Velocity Time Integral), using pulsed wave Doppler…

Care after return of spontaneous circulation (ROSC)

…CCU may be suitable for stable (hemodynamically and respiratory) and fully conscious patients who experienced a brief cardiac arrest. Post resuscitation care is an integral…

🟠 Right ventricle, pulmonary artery, pulmonary artery pressure

…5 mmHg Valve area according to the continuity equation (cm²) ≤ 1 cm² ZTime velocity integral of the tricuspid inflow (cm) 60 cm Pressure half time …

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