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78 Possible Causes for Electrical Alternans

  • Pericardial Effusion

    […] pericardial effusion produces a triad of: Low QRS voltage Tachycardia Electrical alternans ECG findings with Electrical alternans Electrical alternans occurs when consecutive[lifeinthefastlane.com] Electrical Alternans 5.[slideshare.net] Electrical alternans vs. pseudoelectrical alternans.[lifeinthefastlane.com]

  • Cardiac Tamponade

    Electrical alternans – i.e the beat-to-beat variation i electrical amplitude – is the ECG hallmark of cardiac tamponade.[ecgwaves.com] The electrocardiogram showed low-voltage QRS complex with electrical alternans.[ncbi.nlm.nih.gov] Electrical alternans consists of beat-to-beat shifts in the QRS complex due to swinging of the heart in a large effusion.[medcomic.com]

  • Malignant Pericardial Effusion

    EKG showing sinus tachycardia, low QRS voltage and electric alternans, suggesting pericardial effusion. Figure 2. C hest X-ray pre- and post-pericardiocentesis.[swjpcc.com] RESULTS: For PEs of all sizes, the Se, Sp, PPV, and NPV for detecting cardiac tamponade were: low-voltage complexes (56%, 74%, 81%, 46%), electrical alternans (23%, 98%, 95%[ncbi.nlm.nih.gov] At initial evaluation, a chest radiograph may provide evidence of an enlarged cardiac silhouette, while at electrocardiography (ECG) low-voltage complexes and electrical alternans[oncologypro.esmo.org]

  • Dissecting Aortic Aneurysm

    We report a case of 65-year male patient, a known hypertensive and a chronic smoker, who presented to the Civil Hospital, Karachi with complaints of cough, hemoptysis and shortness of breath for three weeks. The chest radiograph showed left apical solitary pulmonary nodule (SPN) and aneurysmal dilatation of the[…][ncbi.nlm.nih.gov]

  • Pulsus Alternans

    alternans and mechanical alternans are both associated with cardiac ischaemia and in the case of electrical alternans there is a strong link with serious ventricular arrhythmia[doi.org] Both mechanical and electrical alternans disappeared with afterload reduction by nitroprusside treatment.[ncbi.nlm.nih.gov] Kalter and Schwartz first identified electrical alternans on surface ECG in 1948 Electrical alternans must be distinguished from mechanical alternans (eg, pulsus alternans[mdnxs.com]

  • Hyperkalemia

    The case highlights the importance of recognizing hyperkalemia, as potential triggers of the acquired Brugada sign with electrical alternans.[ncbi.nlm.nih.gov]

  • Pericardial Disorder

    C, Beat-to-beat variations in amplitude and contour of the QRS and ST-T complexes that characterize electrical alternans.[veteriankey.com] Electrical alternans – i.e the beat-to-beat variation i electrical amplitude – is the ECG hallmark of cardiac tamponade.[ecgwaves.com] alternans Signs of severe pericardial tamponade : ST segment elevation T wave flattening or inversion Pericardial fluid drainage : used to sample the effusion in cases of[amboss.com]

  • Influenza

    The electrocardiogram showed low-voltage QRS complex with electrical alternans.[ncbi.nlm.nih.gov]

  • Cardiac Arrhythmia

    Calcium alternans While electrical alternans can be attributed to cellular electrical currents and in some cases to dynamics associated with the APD restitution curve, alternans[scholarpedia.org] Electrical alternans during rest and exercise as predictors of vulnerability to ventricular arrhythmias. Am J Cardiol. 1997 ; 80 :1314–1318.[doi.org] Guevara MR, Ward G, Shrier A, Glass L. (1984) Electrical alternans and period doubling bifurcations. Comput Cardiol: 167–170.[scholarpedia.org]

  • Pericardial Calcification

    alternans ECHO – diagnostic, echo-free zone around the heart, diastolic collapse of RA&RV Management : Seek expert help Urgent drainage Send fluid for culture, ZN stain/TB[wikilectures.eu] In cardiac tamponade, the ECG shows electrical alternans as the heart “floats” in relation to the recording leads.[aafp.org] Electrical alternans is associated with variation in cardiac position (swinging heart).[merckmanuals.com]

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