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66 Possible Causes for Incomplete Right Bundle Branch Block, Prolonged PR Interval, Right Axis Deviation

  • Ostium Primum Atrial Septal Defect

    In primum defects left axis deviation is seen in most patients with an axis of -30 degrees and very few patients have right axis deviation.[en.wikipedia.org] Complete heart block may be revealed in ostium primum type Large ASD may have prolonged PR interval 18.[slideshare.net] Right ventricle hypertrophy markers or incomplete right bundle branch block may be present.[symptoma.com]

  • Patent Foramen Ovale

    deviation of the QRS complex while those with a secundum ASD have a right axis deviation of the QRS complex.[marmur.com] Incomplete right bundle branch block is frequently present. Crochetage (a notch seen in QRS in leads II and III) can be seen in secundum ASD cases.[thecardiologyadvisor.com] A common finding in the ECG is the presence of incomplete right bundle branch block, which is so characteristic that if it is absent, the diagnosis of ASD should be reconsidered[en.wikipedia.org]

  • Patent Ductus Arteriosus

    His chest X-ray showed cardiomegaly and enlargement of the left pulmonary hilum, and an electrocardiogram revealed sinus tachycardia with incomplete right bundle branch block[elsevier.pt]

  • Bifascicular Block

    Right Bundle Branch Block and Left Posterior Fascicular Block (RBBB/LPFB) This is essentially right bundle branch block with right axis deviation.[ecgmedicaltraining.com] bundle branch block AND incomplete left bundle branch block Right bundle branch block with left bundle branch block Right bundle branch block, anterior fascicular block AND[icd9data.com] Perioperative risk of complete heart block in patients with bifascicular block and prolonged PR interval.[thorax.bmj.com]

  • Cardiomyopathy

    Electrocardiogram showed right axis deviation, poor R-wave progression, and diffuse ST-segment elevation in the anterior leads, and cardiomegaly was observed by roentgenogram[ncbi.nlm.nih.gov] Right axis deviation suggests associated right ventricular hypertrophy (i.e. biventricular enlargement ).[lifeinthefastlane.com] deviation (right or left) Conduction abnormalities (P-R prolongation, bundle-branch block) Sinus bradycardia with ectopic atrial rhythm Atrial enlargement Abnormal and prominent[emedicine.medscape.com]

  • Ostium Secundum Atrial Septal Defect

    ECG may show right bundle branch block and right axis deviation. Chest radiography typically reveals prominent pulmonary vasculature with right ventricular hypertrophy.[xpertdox.com] Figure 1 The electrocardiogram of a 42-year-old woman with the ostium secundum type of atrial septal defect shows normal sinus rhythm with incomplete right bundle-branch block[nejm.org] Complete heart block may be revealed in ostium primum type Large ASD may have prolonged PR interval 18.[slideshare.net]

  • Left Posterior Fascicular Block

    axis deviation, alongside several other findings involving the QRS complex.[symptoma.com] Incomplete right bundle branch block (RBBB pattern) is accompanied by left posterior fascicular block. QRS axis is about 120 degrees (right axis deviation).[metealpaslan.com] PR interval.[oxfordmedicaleducation.com]

  • Atrial Septal Defect Type Ostium Primum

    Normal axis or right axis deviation due to right ventricular diastolic overload. Right atrial abnormality ( may not be observed in children ).[metealpaslan.com] Figure 1 The electrocardiogram of a 42-year-old woman with the ostium secundum type of atrial septal defect shows normal sinus rhythm with incomplete right bundle-branch block[nejm.org] Complete heart block may be revealed in ostium primum type Large ASD may have prolonged PR interval 18.[slideshare.net]

  • Eosinophilic Endomyocardial Disease

    Electrocardiography (ECG) showed a right axis deviation and T waves changes. Cardiac magnetic resonance imaging (MRI) was performed to aid in the diagnosis.[ncbi.nlm.nih.gov] The ECG showed new-onset incomplete right bundle branch block, poor R-wave progression in V1–V3 and negative T waves in V1–V5.[revportcardiol.org]

  • Endocardial Cushion Defect

    Clinical features- See hemodynamics Radiography- See hemodynamics ECG- Left axis deviation Counterclockwise depolarization- as initial left to right septal depolarization[heartpearls.com] ECG shows a superiorly directed QRS axis (eg, left axis deviation or northwest axis), frequent 1st-degree AV block, left or right ventricular hypertrophy or both, and occasional[merckmanuals.com] Prolongation of the PR and QRS intervals is also common. Figure 4.[clinicaladvisor.com]