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320 Possible Causes for Bradycardia, Prolonged PR Interval

  • Hyperkalemia

    The significance of sever bradycardia can vary widely.[] ., prolonged PR interval, wide QRS complex) as an alternative to 10 units of short acting insulin.[] , prolonged PR interval, prolonged QRS interval, loss of P wave, sine waves and finally ventricular fibrillation (see ECG guideline for normal values for age) ECG CHANGES[]

  • Verapamil

    […] disease, and the number and types of other medications, are further predictors of marked bradycardia with hypotension.[] Ritonavir also prolongs the PR interval in some patients; however, the impact on the PR interval of coadministration of ritonavir with other drugs that prolong the PR interval[] Increased levels can lead to prolongation of PR interval, increased QRS duration and an increase in QT interval.[]

  • Sinoatrial Block

    The purpose of the present article is to show that the patients have apparent bradycardia-dependent SA block, namely, not true bradycardia-dependent SA block.[] This is different than a first-degree atrioventricular, or AV, block, which shows a prolonged PR interval.[] Mobitz Type 1 (Wenckebach) • Gradual prolongation of PR interval until nonconducted p wave • RP-PR reciprocity • Lengthening of the PR interval at progressively shorter decrements[]

  • Propranolol

    In 2015, Gilead Sciences, the manufacturer of sofosbuvir, warned that bradycardia could occur when sofosbuvir is administered in combination with amiodarone.[] Beta blockade produces: Sinus, junctional or ventricular bradycardia Prolonged PR interval Atrioventricular block (1st-3rd degree) Sodium-channel blockade produces: Broad[] [ECG], but manually calculated to be 440 ms]), no cardiac abnormalities (PR interval: 104 ms, QRS duration: 78 ms), and generalised anxiety disorder (ICD-10-CM Diagnosis[]

  • Second Degree Atrioventricular Block

    We present an example of bradycardia-dependent aberrancy in the left posterior fascicle in the presence of type I second-degree atrioventricular block occurring in the setting[] On the surface ECG this is realized through a prolonged PR interval.[] An attempt was made to explain the mechanism for such apparent bradycardia-dependent atrioventricular block by using the concepts of periodic increases in vagal tone due to[]

  • 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.[] As temperatures continue to drop, the ECG will demonstrate prolonged intervals: PR, followed by QRS and then QTc.[] Additional findings included atrial fibrillation, severe sinus bradycardia, and prominent J (Osborn) waves.[]

  • Procainamide

    No proarrhythmia, bradycardia, or significant hypotension was observed.[] Procainamide is known to prolong PR, QRS, and QTc intervals in adults and is utilized to unmask the distinct electrocardiographic signatures, including right bundle branch[] Patients with other risk factors (eg, older age, female sex, bradycardia, hypokalemia, hypomagnesemia, heart disease, and higher drug concentrations) are likely at greater[]

  • AV Block Mobitz II

    (C) Bradycardia with normal heart rate intervals at a rate of 55 after Mobitz type II AV block. (D) Mobitz type II AV block reappeared when the ureterus was repaired.[] Commonly used terminology includes: First degree AV block – Delayed conduction from the atrium to the ventricle (defined as a prolonged PR interval of 200 milliseconds) without[] Every-other-P wave conducts – as determined by the presence of a fixed ( albeit prolonged ) PR interval preceding each QRS complex on the tracing.[]

  • AV Block Mobitz I

    (C) Bradycardia with normal heart rate intervals at a rate of 55 after Mobitz type II AV block. (D) Mobitz type II AV block reappeared when the ureterus was repaired.[] The hallmark of Mobitz type 1 block is the gradual prolongation of PR intervals before a block occurs. Mobitz type 2 block has constant PR intervals before blocks occur.[] Requiring similar P wave morphology when assessing an arrhythmia for AV block eliminates other potential causes of bradycardia such as wandering pacemaker, sinus pauses, and[]

  • 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[] PR intervals).[] […] associated with quinidine was consistently greater than that associated with any of a variety of alternative antiarrhythmics Acute rheumatic fever, acute thyrotoxicosis, bradycardia[]

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