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203 Possible Causes for Bradycardia, Wide QRS Complex

  • Hyperkalemia

    The significance of sever bradycardia can vary widely.[omicsonline.org] QRS complexes.[ncbi.nlm.nih.gov] complex tachycardia.[ncbi.nlm.nih.gov]

  • Third Degree Atrioventricular Block

    It can also cause bradycardia and even total atrioventricular block. Rarely, it causes coronary artery spasm and even myocardial infarction.[ncbi.nlm.nih.gov] ECG features of 3rd degree AV block On the ECG P-waves have no relation to the QRS complexes. The QRS complexes may be normal or wide.[ecgwaves.com] The unopposed parasympathetic tone in patients with dysautonomia may make them susceptible to bradycardia and atrioventricular block.[ncbi.nlm.nih.gov]

  • Myocardial Infarction

    On occasion the physician may order atropine sulfate with morphine to counteract serious bradycardia.[medical-dictionary.thefreedictionary.com] […] event is a reasonable possibility (e.g. ventricular fibrillation, pulseless ventricular tachycardia, cardiogenic shock, inappropriate use of thrombolytics, hypotension, bradycardia[doi.org] Bradycardia, AV Block, and Intraventricular Conduction Defects 9.5.4.1.[doi.org]

  • 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] 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]

  • Congenital Heart Block

    Abstract Persistent fetal bradycardia in early pregnancy is a rare finding and indicates towards congenital heart block.[ncbi.nlm.nih.gov] If a narrow QRS complex is present, Mobitz I is suspected. If a wide QRS complex is seen, the block is likely infranodal.[thecardiologyadvisor.com] No sinus bradycardia or AV block were manifested in pups from control nonimmunized WT mothers.[ncbi.nlm.nih.gov]

  • Ventricular Bigeminy

    In all cases showing bradycardia-dependent termination, bigeminy was suddenly terminated with no changes in coupling of the preceding extrasystoles when the heart rate was[ncbi.nlm.nih.gov] The signal that originated in the ventricle can be distinguished from a normal signal by its wide QRS complex and lack of a P wave.[wisegeek.com] ECG recordings showed sinus bradycardia and multiple PVCs with various morphologies, couplets and recurrent torsades de pointes requiring multiple defibrillations despite[academic.oup.com]

  • Bifascicular Block

    Altogether, 24 patients had a significant bradycardia diagnosed by either or both methods.[ncbi.nlm.nih.gov] Pacer spikes are not readily seen, but the width of the QRS, the axis of the wide QRS complexes (left), and the timing (after a pause) all support the paced rhythm diagnosis[ecgguru.com] A bradycardia episode was defined as a heart rate of 30 beats/min lasting or 6 s.[ncbi.nlm.nih.gov]

  • 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] The diagnosis of type II A-V block or type I block with wide QRS complexes should disbar from medical certification to fly.[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]

  • Cholinergic Crisis

    The much shorter “Triple B” only stands for Bradycardia, Bronchospasm, and Bronchorrhea.[symptoma.com] There is bradycardia in cholinergic crisis while tachycardia in myasthenic crisis. Secretions are normal in myasthenic crisis while increased in cholinergic crisis.[allmedicalstuff.com] The second inhibitory phase is delayed and often heralded by hypotension, bradycardia, and dyspnea, finally leading to coma and respiratory failure. Management .[doi.org]

  • Digitalis Toxicity

    ., sinus bradycardia, atrioventricular block, nonparoxysmal atrioventricular junctional tachycardia, and ventricular tachycardia.[ncbi.nlm.nih.gov] Excessive vagal effects of digoxin in resting subjects may cause the bradycardia found in these in patients in the absence of digitalis toxicity.[ncbi.nlm.nih.gov] Approach to Bradycardia See our prior chief blog post on management and ddx of bradycardia![ucsfmed.wordpress.com]

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