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The Cardiac Electrical Axis: ECG Criteria, Definition, Clinical Implications

…with a 0 degree value assigned along the lead axis of V6 [3]. Clinical Implications of Axis Deviation Deviations in the electrical axis serve as…

Extracorporeal cardiopulmonary resuscitation (ECPR)

…Extracorporeal Life Support (ECLS) encompasses several extracorporeal systems designed to assist in cases of cardiac or respiratory failure by means of an extracorporeal pump and…

Sinus tachycardia & Inappropriate sinus tachycardia

…node discharges electrical impulses at a higher frequency than normal. Similar to sinus rhythm, the rhythm is regular with a positive P wave in lead…

Stress Echocardiography: Protocols and Interpretation

…local expertise. Clinical Presentation and Indications Stress echocardiography is used in patients with suspected or known CAD when the clinical question concerns the presence, extent…

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

…the QRS complex. The PR interval is assessed in order to determine whether impulse conduction from the atria to the ventricles is normal. The flat…

Short and long-term prognostication in cardiac arrest

…Asystole and pulseless electrical activity (PEA) often have other etiologists, but are also seen in ischemia or infarction when no flow or low flow time…

Components and construction of a pacemaker

…main principle behind artificial pacemakers; i.e applying an external electrical current that depolarizes cells in contact with the lead tip, and thus generate an…

Terminology of sudden cardiac arrest and resuscitation

…ventilation and automatic external defibrillator (AED). Return of Spontaneous Circulation (ROSC) : Return of mechanical cardiac function resulting in circulation with pulse. Coronary perfusion pressure (CPP) …

The ECG leads: Electrodes, limb leads, chest (precordial) leads and the 12-Lead ECG

…during the cardiac cycle, all ECG leads analyze the same electrical events but from different angles. This means that ECG leads with similar angles must…

The ultrasound transducer

…When an electric current is applied to a piezoelectric crystal, it starts to vibrate and these vibrations generate sound waves with frequencies between 1.5…

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