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320 Possible Causes for Bradycardia, Prolonged PR Interval

  • Hyperkalemia

    The significance of sever bradycardia can vary widely.[omicsonline.org] ., prolonged PR interval, wide QRS complex) as an alternative to 10 units of short acting insulin.[ncbi.nlm.nih.gov] , 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[starship.org.nz]

  • Verapamil

    […] disease, and the number and types of other medications, are further predictors of marked bradycardia with hypotension.[ncbi.nlm.nih.gov] 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[pdr.net] Increased levels can lead to prolongation of PR interval, increased QRS duration and an increase in QT interval.[casesjournal.biomedcentral.com]

  • 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.[ncbi.nlm.nih.gov] This is different than a first-degree atrioventricular, or AV, block, which shows a prolonged PR interval.[healio.com] 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[slideshare.net]

  • Propranolol

    In 2015, Gilead Sciences, the manufacturer of sofosbuvir, warned that bradycardia could occur when sofosbuvir is administered in combination with amiodarone.[ncbi.nlm.nih.gov] Beta blockade produces: Sinus, junctional or ventricular bradycardia Prolonged PR interval Atrioventricular block (1st-3rd degree) Sodium-channel blockade produces: Broad[lifeinthefastlane.com] [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[ncbi.nlm.nih.gov]

  • 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[ncbi.nlm.nih.gov] On the surface ECG this is realized through a prolonged PR interval.[ems12lead.com] 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[ncbi.nlm.nih.gov]

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

  • Procainamide

    No proarrhythmia, bradycardia, or significant hypotension was observed.[ncbi.nlm.nih.gov] 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[ncbi.nlm.nih.gov] Patients with other risk factors (eg, older age, female sex, bradycardia, hypokalemia, hypomagnesemia, heart disease, and higher drug concentrations) are likely at greater[drugs.com]

  • 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.[anesthesiology.pubs.asahq.org] 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[uptodate.com] Every-other-P wave conducts – as determined by the presence of a fixed ( albeit prolonged ) PR interval preceding each QRS complex on the tracing.[ecg-interpretation.blogspot.com]

  • 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.[anesthesiology.pubs.asahq.org] 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.[ecgwaves.com] 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[ahcmedia.com]

  • 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] PR intervals).[af-ablation.org] […] 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]

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