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Cardiac thromboembolism: cardiac sources of embolism

…ranked according to their embolic potential. Conditions with high embolic potential entail a high risk of embolism and vice versa . Table 1 lists these conditions…

Endocarditis: definitions, causes, diagnosis, echocardiography & treatment

…of endocarditis. Endocarditis gives three typical findings on echocardiography: Vegetations. Abscesses. Prosthetic detachment. These three findings constitute the main criteria for diagnosing endocarditis. Traditionally, it…

Management of bradycardia (bradyarrhythmia)

…Parameter Assessment A Airway Voice Breath sounds B Breathing Respiratory rate (12–20 / min) Chest wall movements Chest percussion Lung auscultation Pulse oximetry ( 95%) C…

QT duration & corrected QT (QTc) duration: ECG features & implications

ECG Introduction to ECG interpretation QT duration and corrected QT (QTc) duration ECG interpretation always includes an assessment of the QT interval (QT duration). The…

The T-wave: physiology, variants and ECG features

ECG Introduction to ECG interpretation The normal T wave Assessment of the T wave represents a difficult but fundamental part of ECG interpretation. The normal…

Aberrant ventricular conduction (aberrancy, aberration)

…length of the refractory period (see Basic Cardiac Electrophysiology) varies with heart rate. The length is shortened as heart rate increases and vice versa. Thus…

Long QT (QTc) interval, long QT syndrome (LQTS) & torsades de pointes

…As the heart rate increases, the QT interval decreases and vice versa. The physiological purpose of this phenomenon is to allow for faster cardiac cycles…

Myocardial Ischemia & infarction: Cellular changes, ECG and symptoms

…Cardiac cells are highly capable of matching the supply and demand of ATP; increased cardiac workload results in increased ATP production and vice versa. Importantly…

The Continuity Equation (The Principle of Continuity)

…related to the area of the orifice; velocity increases with diminishing area of the orifice, and vice versa . Figure 1. The principle of continuity (the…

Assessment of diastolic function by echocardiography

…parameters. Blod flow velocities across the mitral valve and mitral annular plane velocity are standard assessments. Mitral flow velocities are measured using Pulsed Doppler. Tissue…

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