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18 Possible Causes for Decreased Intensity of S1

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  • Mitral Valve Incompetence

    Acquired left ventricular-to-right atrial communication is encountered periodically. This condition is chiefly attributable to surgical mishaps, trauma, endocarditis, or endomyocardial biopsy. In a few instances, a Gerbode-like defect develops after the repair of an atrioventricular septal defect. Our search of the[…][ncbi.nlm.nih.gov]

  • Papillary Muscle Dysfunction

    The purpose of this research was to test whether papillary muscle (PM) dysfunction attenuates ischemic mitral regurgitation (MR) in patients with left ventricular (LV) remodeling of a similar location and extent. Papillary muscle dysfunction could attenuate tethering and MR because of PM elongation. However,[…][ncbi.nlm.nih.gov]

  • Mitral Valve Insufficiency

    History Acute mitral regurgitation When associated with coronary artery disease and acute myocardial infarction (typically, inferior myocardial infarction, which may lead to papillary muscle dysfunction), significant acute mitral regurgitation (MR) is accompanied by symptoms of impaired LV function, such as dyspnea,[…][emedicine.medscape.com]

  • Acute Myocardial Infarction

    Since their introduction, oral contraceptives (OCs) have been associated with risk to both the venous and the arterial systems. Studies have shown that OC use is associated with a risk of venous thromboembolism, ischaemic stroke and acute myocardial infarction (MI). MI is rarely seen in patients using OCs,[…][ncbi.nlm.nih.gov]

  • Myocardial Infarction

    New-onset atrial fibrillation (NOAF) is a common finding in patients with myocardial infarction (MI), but few studies are available regarding the prediction model for its risk estimation. Although Global Registry of Acute Coronary Events (GRACE) risk score (RS) has been recognized as an effective tool for the risk[…][ncbi.nlm.nih.gov]

  • Spinal Epidural Abscess

    […] the dorsal sac and decreased signal intensity of the L5 and S1 vertebral bodies .[casesjournal.biomedcentral.com] A decreased signal intensity of the L5 and S1 vertebral bodies was also demonstrated (Figure 1 ).[casesjournal.biomedcentral.com] On the pre-contrast T1-Weighted Spin-echo (SE) sagittal images, a fluid collection in the posterior epidural space with low signal intensity and anteriorly compressing the[casesjournal.biomedcentral.com]

  • Multiple Epiphyseal Dysplasia due to Collagen 9 Anomaly

    The discs L2/L3–L5/S1 were evaluated on MRI, using decreased signal intensity of the nucleus pulposus, posterior disc bulges, and decreased disc height as signs of disc degeneration[journals.lww.com]

  • Diffuse Intraventricular Block

    Factors that decrease the intensity of the S1 heart sound include long PR interval, slow heart rate and severe mitral stenosis.[healio.com] Factors that increase the intensity of the S1 heart sound include short PR interval, fast heart rate and mild mitral stenosis.[healio.com]

  • Meningeal Melanocytoma

    M, Sagittal FSE T2-weighted MR image of the thoracic and lumbar spine shows decreased signal intensity in the intraspinal mass at the L5–S1 level ( arrow ).[ajnr.org] L, Sagittal contrast-enhanced T1-weighted MR image of the thoracolumbar spine shows extensive intradural enhancement and an anterior intraspinal mass at the L5–S1 level.[ajnr.org]

  • Hepatic Brucellosis

    A decreased signal intensity of the L5 and S1 vertebral bodies was also demonstrated.[emro.who.int] On the pre-contrast T1-sagittal images, a collection of fluid with low signal intensity was detected in the posterior epidural space that was anteriorly compressing the dorsal[emro.who.int]

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