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46 Possible Causes for P Wave Absent, Prolonged PR Interval

  • Hyperkalemia

    Role of inducing K loss via the GI tract in the management of hyperkalemia Setting Recommendations Hyperkalemia with severe ECG changes (e.g. absent P waves, wide QRS complex[doi.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]

  • Electrolyte Imbalance

    U waves B. Absent P waves C. Elevated T waves D. Elevated ST segment 57. A. Obtaining a controlled IV infusion pump B. Monitoring urine output during administration C.[proprofs.com] .  Assessment findings: serum magnesium level is greater than 2.3mg/dl creatinine clearance decreases to less than 3.0ml/min ECG finding: prolonged PR interval : tall T waves[slideshare.net] The PR interval is prolonged. Occasionally sinoatrial (SA) block, second- or third-degree atrioventricular (AV) block may develop.[ecgwaves.com]

  • Sinoatrial Block

    There is progressive shortening of the P-P interval, followed by an absent P wave-QRS complex.[lifeinthefastlane.com] This is different than a first-degree atrioventricular, or AV, block, which shows a prolonged PR interval.[healio.com] In 3rd-degree SA block, conduction is blocked; P waves are absent, giving the appearance of sinus arrest.[merckmanuals.com]

  • AV Block Mobitz I

    wave, but are absent periodically Key Points: The Second Degree AV Block Type I is characterized by a progressively prolonged PR interval.[emtresource.com] 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] The conducted basic PR interval is usually normal in ttype 2 AV block. In wenkebach the PR interval is usually prolonged.(Not always though![drsvenkatesan.com]

  • Sinus Arrest

    Occasionally and when the P waves are absent for a relatively long time, escape beats appear, as other groups of myocardial cells undertake the pacemaking process for a brief[symptoma.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] Mobitz Type 2: Impulses intermittently fail to be conducted, without prolongation of the PR interval.[fastbleep.com]

  • Accidental Hypothermia

    Abstract His bundle electrocardiography was performed on a patient with accidental hypothermia on whom the standard electrocardiogram (ECG) showed absent P waves, prominent[ncbi.nlm.nih.gov] As temperatures continue to drop, the ECG will demonstrate prolonged intervals: PR, followed by QRS and then QTc.[foamcast.org] Multiple other findings eventually develop including a shortened QT interval, ST depression, bundle branch blocks, widened QRS, prolonged PR interval, flattened T wave and[foamcast.org]

  • Ventricular Fibrillation

    Answers Rhythm: Irregular Rate: Unable to determine P Wave: absent PR interval: absent QRS: absent Interpretation: Ventricular Fibrillation (Fine) Description The morphologic[ekg.academy] ECG : [ 1 ] evidence of MI, prolonged QT interval, short PR, WPW pattern or other conditions. CXR: signs of left heart failure, pulmonary hypertension.[patient.info] Answers Rhythm: Irregular Rate: Unable to determine P Wave: absent PR interval: absent QRS: absent Interpretation: Ventricular Fibrillation (Fine)[ekg.academy]

  • Atrial Fibrillation

    P waves are absent and replaced by irregular electrical activity. The ventricular rate is irregular and chaotic.[web.archive.org] A history of syncope, sinus bradycardia, PR interval prolongation, and bundle-branch block raise concerns for a risk of bradyarrhythmia during antiarrhythmic drug therapy.[doi.org] P waves are absent and replaced by irregular electrical activity. The ventricular rate is irregular and chaotic. Figure 1 Electrocardiogram showing atrial fibrillation.[aafp.org]

  • Sick Sinus Syndrome

    In 3rd-degree SA block, conduction is blocked; P waves are absent, giving the appearance of sinus arrest.[merckmanuals.com] ECG Examples Example 1 Sinus arrest: Prolonged absence of sinus node activity (absent P waves) 3 seconds.[lifeinthefastlane.com] In type II 2nd-degree SA block, conduction of impulses is blocked without slowing beforehand, producing a pause that is a multiple (usually twice) of the P-P interval and[merckmanuals.com]

  • Bifascicular Block

    ECG changes: An absent P wave and often an absent QRS complex are seen.[frca.co.uk] Perioperative risk of complete heart block in patients with bifascicular block and prolonged PR interval.[thorax.bmj.com] To make it trifascicular, one also needs to have a prolonged PR interval. Here's a block from the author's own collection.[derangedphysiology.com]

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