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P-wave, PR interval, PR segment: physiology, criteria & ECG findings

…with the right atrium being depolarized before the left atrium. The first half of the P wave is therefore a reflection of right atrial depolarization…

Overview of the ECG Waves, Deflections, Intervals, Durations

…left ventricle is usually considerably larger than the right ventricle, the QRS complex is actually a reflection of the electrical potentials generated by the left…

Technical aspects of the ultrasound image

Echocardiography Generating the ultrasound image The ultrasound transducer generates short bursts (pulses) of ultrasound waves. Reflected ultrasound waves are analyzed by the machine during the…

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

…generated by the right ventricle, the QRS complex is actually a reflection of left ventricular depolarization. QRS duration is the time interval from the onset…

Opioid therapy in severe pain

…excreted metabolite that causes late sedation and respiratory depression Marked liver failure A reduced dose of all of them, at a longer interval All op

Left atrial enlargement (P mitrale) & right atrial enlargement (P pulmonale) on ECG

…with the right atrium being depolarized before the left atrium. The first half of the P wave is therefore a reflection of right atrial activation…

Brugada Syndrome: Diagnosis & SCD Prevention

Cardiology Introduction Since its initial description in 1992 as a syndrome of right bundle branch block, ST segment elevation, and sudden cardiac death (SCD), Brugada…

Diuretic Strategy and Decongestion in Heart Failure

…impaired renal venous outflow and persistent right sided congestion may be important mechanisms. Diuretics relieve the hemodynamic consequences of congestion by producing a negative sodium…

Coronary Anatomy and Segmental Classification for the Clinician

…visual diameter reduction. Relevant determinants include: Lesion eccentricity Vessel tortuosity Calcification Plaque rupture or asymmetric filling defects Serial lesions Vessel size The relationship of the…

ST-Elevation Myocardial Infarction Complicated by Cardiogenic Shock

…blocker exposure. The incidence of cardiogenic shock complicating STEMI has fallen with prompt reperfusion and reduction of infarct size. Earlier estimates approached 20%, whereas contemporary…

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