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250 Possible Causes for Bradycardia, Prolonged PR Interval

  • Second Degree Atrioventricular Block

    Abstract 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[ncbi.nlm.nih.gov] This case demonstrates the need for caution and interval cardiac testing when adding LCM to other AEDs known to prolong the PR interval.[ncbi.nlm.nih.gov] 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]

  • 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[reliasmedia.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]

  • 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]

  • 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] Prolongation of PR intervals by G coadministration was borderline significant; an increase above 350 ms occurred in two individuals during the G period.[doi.org] These patients should be carefully monitored for abnormal prolongation of the PR interval or other signs of overdosage (see OVERDOSAGE ).[web.archive.org]

  • Propranolol

    Interestingly, among the reported cases of patients with sofosbuvir and amiodarone related bradycardia, some of them were also treated with propranolol.[ncbi.nlm.nih.gov] [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] Propranolol can have potentially serious adverse side effects, including bradycardia, hypotension, and hypoglycemia.[ncbi.nlm.nih.gov]

  • Accidental Hypothermia

    Abstract 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]

  • Sick Sinus Syndrome

    Abstract Bradycardia-dependent block or activation delay of the atrial tissue has not been documented in the literature.[ncbi.nlm.nih.gov] On postnatal electrocardiography, there was junctional escape rhythm due to profound sinus bradycardia, leading us to consider sick sinus syndrome.[ncbi.nlm.nih.gov] People suffering from bradycardia may present with palpitations, exercise intolerance and fainting.[ncbi.nlm.nih.gov]

  • Procainamide

    Confusion, seizures, hypotension, bradycardia, reflex tachycardia, ventricular dysrhythmias, AV blocks, asystole, widening of PR, QRS, and Q-T intervals, N/V.[quizlet.com] BACKGROUND: Procainamide is known to prolong PR, QRS, and QTc intervals in adults and is utilized to unmask the distinct electrocardiographic signatures, including right bundle[ncbi.nlm.nih.gov] Torsades de Pointes (associated with high levels of procainamide and/or NAPA; secondary to prolonged QT interval ) heart block prolongation of PR, QRS, QT intervals (up to 50%) bradycardia[lhsc.on.ca]

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