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68 Possible Causes for Bradycardia, Prominent U Wave

  • Sinus Bradycardia

    Bradycardia is not necessarily problematic.[en.wikipedia.org] Note the prominent U waves in the precordial leads, a common finding in sinus bradycardia.[lifeinthefastlane.com] To report a case of thalidomide-induced sinus bradycardia in an elderly man.[ncbi.nlm.nih.gov]

  • Digoxin

    To describe the development of bradycardia during sedation with dexmedetomidine in a patient concurrently receiving digoxin. Case report.[ncbi.nlm.nih.gov] The terminal positive deflection may be peaked, or have a prominent U wave superimposed upon it.[lifeinthefastlane.com] The cause of death was given as cardiac failure, hypotension and bradycardia due to a mixed drug overdose of verapamil, metoprolol and digoxin, based on the results of the[ncbi.nlm.nih.gov]

  • Myxedema

    Often present as hypotension and bradycardia, hypoventilation, hyponatremia, and hypoglycemia, often with concomitant adrenal insufficiency.[errolozdalga.com] Progressive signs like constipation, dry skin, hoarseness of voice, arthritis, and bradycardia.[symptoma.com] Other features include bradycardia/low voltage, hyponatremia, and hypothermia MUST rule out or consider concomitant adrenal insufficiency because if you administer synthroid[uclaoliveview.org]

  • Quinidine

    This case provides the first evidence to suggest that a quinidine-induced long QTU interval and torsade de pointes may be related to bradycardia-dependent early afterdepolarizations[ncbi.nlm.nih.gov] […] associated with quinidine was consistently greater than that associated with any of a variety of alternative antiarrhythmics Acute rheumatic fever, acute thyrotoxicosis, bradycardia[reference.medscape.com]

  • Accidental Hypothermia

    A 35-year-old schizophrenic patient was admitted to the Coronary Care Unit with shock, bradycardia and ST-T changes mimicking acute myocardial infarction.[ncbi.nlm.nih.gov] Additional findings included atrial fibrillation, severe sinus bradycardia, and prominent J (Osborn) waves.[ncbi.nlm.nih.gov] When the patient was seen in hospital, bradycardia (30.min-1), bradypnoea (5. min-1), scarcely reacting pupils, and Glasgow Coma Scale 3 were noted.[ncbi.nlm.nih.gov]

  • Hypokalemic Periodic Paralysis

    We report a rare case of a patient with a novel SCN4A mutation who presented, on ECG, extreme bradycardia and syncopal sinus arrest that required a temporary pacemaker implant[ncbi.nlm.nih.gov] Due to prolonged repolarization of ventricular Purkinje fibers, a prominent U wave occurs, that is frequently superimposed upon the T wave and therefore produces the appearance[flipper.diff.org] However, beta-blockers should be used only with caution, since they can produce severe problems in people with low blood pressure, slow heart rate (bradycardia) or asthma.[simulconsult.com]

  • Hypokalemia

    An ECG demonstrated sinus bradycardia, ST-segment depression, T-wave flattening, U-wave, and long-QTc. Symmetric carpal and pedal spasms were observed.[ncbi.nlm.nih.gov] prominent U waves require hospital admission.[physio-pedia.com] Furthermore, hypokalemia affects automaticity of the pacemaker cells and leads to multiple arrhythmias such as sinus bradycardia, atrioventricular block, atrial flutter and[meds.queensu.ca]

  • Torsades De Pointes

    Investigation into the cause of her bradycardia and prolonged QT revealed profound hypothyroidism.[ncbi.nlm.nih.gov] Associated with QT interval prolongation and prominent U waves on resting ECG ECG prolonged re-polarisation and so, early after depolarisation (EAD) Can be congenital Usually[emed.ie] Example 2 TdP secondary to hypokalaemia: Sinus rhythm with inverted T waves, prominent U waves and a long Q-U interval due to severe hypokalaemia (K 1.7) A premature atrial[lifeinthefastlane.com]

  • Hypermagnesemia

    Hypermagnesemia should be considered in elderly patients presenting with hypotension, bradycardia, hyporeflexia, or respiratory depression, and particularly in patients with[ncbi.nlm.nih.gov] […] for broadening and inversion of T wave, and the appearance of a prominent U wave.[ncbi.nlm.nih.gov] […] hypermagnesemia was successfully treated with continuous arteriovenous hemodialysis, but she ultimately died from complications of hypermagnesemia, that included junctional bradycardia[ncbi.nlm.nih.gov]

  • Phenylephrine

    Incidence of serious bradycardia was 11% (95% CI: 8.0-14.0).[ncbi.nlm.nih.gov] While on a maximal dose of phenylephrine she developed prominent positive U waves, which disappeared with the cessation of the drug.[ncbi.nlm.nih.gov] Hefer D, Bukharovich I, Nasrallah EJ, Plotnikov A (2005) Prominent positive U waves appearing with high-dose intravenous phenylephrine.[link.springer.com]

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