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10 Possible Causes for Left Bundle Branch Block, Systolic Thrill at Lower Left Sternal Border

  • 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] A transthoracic echocardiogram revealed a PDA with left-to-right shunt (pulmonary/systemic flow [Qp/Qs] ratio of 1.6), left ventricular ejection fraction of 60% and enlargement[elsevier.pt]

  • Aortic Valve Stenosis

    Evidence of this phenomenon may rarely include ECG patterns characteristic of certain types of heart block such as Left bundle branch block.[en.wikipedia.org]

  • Ventricular Septal Defect

    3 to 4/6 holosystolic murmur (with or without thrill) at the lower left sternal border; this murmur is usually audible within the first few days of life (see table Heart[msdmanuals.com] bundle branch block in 0% (0/13) to 4% (1/25), complete heart block in 0% (0/25) to 2% (2/107), aortic regurgitation in 0% (0/13) to 4% (1/25), tricuspid regurgitation in[nice.org.uk] Muscular defects can be heard along the lower left sternal border and may vary in intensity as the defect size changes with muscular contraction throughout systole.[circ.ahajournals.org]

  • Large Ventricular Septal Defect

    3 to 4/6 holosystolic murmur (with or without thrill) at the lower left sternal border; this murmur is usually audible within the first few days of life (see table Heart[merckmanuals.com] block; in large VSDs, it shows left and right ventricular hypertrophy, suggesting pulmonary hypertension.[quizlet.com] Small VSDs typically produce murmurs ranging from a grade 1 to 2/6 high-pitched, short systolic murmur (due to tiny defects that actually close during late systole) to a grade[merckmanuals.com]

  • Tetralogy of Fallot

    Systolic thrill at the lower left sternal border. Aortic ejection click.[patient.info] A patient without cyanosis has a long, loud, systolic murmur with a thrill along the right ventricular outflow tract (RVOT).[patient.info] […] older child with long-standing cyanosis (without surgery) may present with the following signs: Cardiac Right ventricular predominance on palpation or possibly a bulging left[patient.info]

  • Biventricular Hypertrophy

    3 to 4/6 holosystolic murmur (with or without thrill) at the lower left sternal border; this murmur is usually audible within the first few days of life (see table Heart[msdmanuals.com] Left Bundle Branch Block With Left Ventricular Hypertrophy This 92-year-old patient was diagnosed with left bundle branch block on ECG, and left ventricular hypertrophy on[ecgguru.com] METHODS Twenty patients with non-obstructive HCM (12 male, mean age 57 /-13 years), left bundle branch block and symptoms of heart failure refractory to medical therapy underwent[semanticscholar.org]

  • Apical Myocardial Infarction

    This murmur is loudest along the lower left sternal border and is associated with a palpable parasternal systolic thrill. RV and LV S3 gallops are common.[emedicine.medscape.com] , left bundle branch block, ventricular premature contractions and ventricular tachycardia in 5% of patients and ischemic manifestations.[cancerjournal.net] , left bundle branch block and aortic dissection. 8 Aborted Infarction and Thrombolysis Most experience on the issue of MI comes from the setting of thrombolytic therapy,[ecrjournal.com]

  • Right Ventricular Hypertrophy

    3 to 4/6 holosystolic murmur (with or without thrill) at the lower left sternal border; this murmur is usually audible within the first few days of life (see table Heart[merckmanuals.com] Furthermore, the echocardiographic technique was useful in evaluating RVH in 18 patients with an abnormal ECG due to right or left bundle branch block or myocardial infarction[ncbi.nlm.nih.gov] Left bundle branch block: The leads to look in first for left bundle branch block (LBBB) are leads V5, V6, and I.[unm.edu]

  • Tricuspid Valve Insufficiency

    In severe TR, a right jugular venous thrill may be palpable, as may systolic hepatic pulsation and an RV impulse at the left lower sternal border.[merckmanuals.com] Dyssynchronous left ventricular electromechanical activation induced by left bundle branch block or right ventricular pacing is a well-recognized cause of mitral regurgitation[acc.org] Investigations ECG: findings are usually nonspecific; they may show right atrial hypertrophy (tall peaked 'p' waves), incomplete right bundle-branch block, Q waves in lead[patient.info]

  • Multiple Ventricular Septal Defects

    A localized harsh, holosystolic murmur which is best heard at the lower left sternal border, detected after 4-8 weeks of age or later.[medicaljoyworks.com] Permanent bundle branch of Hiss block: found on 6 patients, 2.97 %; 4 RBBB and 2 hemiblock of the posterior subdivision of the left bundle branch late on the follow up, all[medcraveonline.com] Patients can often have a bundle branch block from disruption of the septal conduction system.[intechopen.com]

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