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Arterial Hypertension: Definition, Diagnosis and Out-of-Office Measurement

…hypertension: office pressure below the hypertension threshold but hypertensive home or ambulatory pressure. Office measurements provide only a limited representation of usual blood pressure and…

Capnography (end-tidal carbon dioxide measurement, ETCO2) during cardiac arrest

…Capnography refers to the measurement of end tidal carbon dioxide (ETCO 2 ) in the respiratory system. ETCO 2 is the partial pressure of carbon dioxide …

Assessment of diastolic function by echocardiography

…across the mitral valve using pulsed Doppler. Estimating left ventricular filling pressure via e' . Measurement of deceleration time (DT) . Diastolic function can be estimated from…

Principles of myocardial perfusion imaging (SPECT, PET), coronary blood flow and flow reserve (CFR)

…and parasympathetic influences; sympathetic stimulation leads to vasoconstriction through the release of norepinephrine, while parasympathetic activation can cause vasodilation via acetylcholine release. These mechanisms collectively…

Overview of the ECG Waves, Deflections, Intervals, Durations

…with its most common waveforms. Important intervals and points of measurement are depicted. ECG interpretation requires knowledge of these waves and intervals. The P wave…

Lipoprotein(a): Measurement and Clinical Implications

…high Lp(a) level may lead to substantial underestimation of cardiovascular risk. Conversely, Lp(a) measurement provides limited additional reclassification beyond currently recommended global risk…

Ejection fraction (EF): Physiology, Measurement & Clinical Evaluation

…or supranormal ejection fraction , despite manifest heart failure and severe symptoms. These individuals exhibit pronounced hypertrophy, resulting in a reduction of ventricular volume and subsequently…

Fractional shortening for estimation of ejection fraction

…25% Normal FS, 2D measurement 18% Advantages of fractional shortening If ventricular geometry is normal and there are no regional wall motion abnormalities, then fractional…

ECG interpretation: Characteristics of the normal ECG (P-wave, QRS complex, ST segment, T-wave)

…this chapter, you will learn the physiological basis of all ECG waves and how to determine whether the ECG is normal or abnormal. Although heart…

The Bernoulli principle and estimation of pressure gradients

…2 ) This formula is excellent for measuring pressure gradients across small openings, such as the valves. Importantly, in the setting of valvular stenosis or regurgitation…

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