概括
在肌肉发育不良 (MD) 患者中,最大静脉内心速度 (SEVM) 和最大腹心内心速度 (DEVM) 降低. 心声检查发现了这些异常,即使在无症状患者中,也表明DEVM与心肌放松相关.
科学领域:
- 心脏病学 心脏病学
- 神经肌肉疾病 神经肌肉疾病
- 诊断成像 诊断成像 诊断成像
背景情况:
- 肌肉发育不良 (MD) 影响骨肌肉,并可能影响心脏功能.
- 评估MD中的心脏参与对于患者管理至关重要.
- 心声谱提供了一种非侵入性的方法来评估心肌功能.
研究的目的:
- 在患有MD的患者中,确定最大静脉内心速度 (SEVM) 和最大腹心内心速度 (DEVM).
- 为了将这些速度与对照组的速度进行比较,包括年龄相匹配的正常人,先天性肌,无条件患者和脊柱肌肉缩.
- 评估心声回声学在识别MD相关心脏异常方面的诊断效用.
主要方法:
- 声心成像被用于测量SEVM和DEVM在患有MD的患者和各种对照组.
- 进行了统计分析,以比较各组之间的速度测量.
- 研究了SEVM/DEVM与临床因素 (如年龄,心率和发育不良症严重程度) 之间的相关性.
主要成果:
- 与大多数对照组相比,MD患者的SEVM显著降低,除了脊柱肌肉缩.
- 与所有其他组相比,MD患者的DEVM显著降低.
- 心声学在识别MD患者方面表现出比心电学更高的选择性.
- 在22名MD患者中,在18名患者中观察到异常DEVM,通常没有症状或其他心脏异常.
结论:
- 肌肉发育不良的患者会减少心内静脉缩和心内静脉缩速度.
- 最大透析内心速度 (DEVM) 在MD中特别降低,可能表明心肌放松受损.
- 心声图是检测MD心脏参与的一个有价值的工具,即使在早期或无症状的阶段.
相关概念视频
Heart Sounds
Heart sounds are generated by the turbulence in blood flow due to the closing of heart valves. These sounds are best perceived slightly away from the valves, where the blood flow disseminates the sound.
Auscultation is the process of listening to these internal body sounds using a stethoscope. The heart produces four types of sounds, but only two—S1 and S2—can usually be heard with a stethoscope.
S1, also known as the "lub" sound, is caused by the closure of atrioventricular (A-V) valves at the...
Auscultation is the process of listening to these internal body sounds using a stethoscope. The heart produces four types of sounds, but only two—S1 and S2—can usually be heard with a stethoscope.
S1, also known as the "lub" sound, is caused by the closure of atrioventricular (A-V) valves at the...
Imbalances in Cardiac Output
The heart's primary function is to pump blood throughout the body, maintaining a balance between blood sent out (cardiac output) and blood returning (venous return). If this balance is disrupted, it can result in congestive heart failure (CHF), a severe condition where the heart becomes an inefficient pump, leading to inadequate blood circulation.
CHF can occur due to the failure of either side of the heart. Left-side failure leads to pulmonary congestion—the right side continues to send blood...
CHF can occur due to the failure of either side of the heart. Left-side failure leads to pulmonary congestion—the right side continues to send blood...
Assessment of the Cardiovascular System IV: Auscultation
Cardiac auscultation is a clinical skill used to assess heart function and detect abnormalities. It involves listening to heart sounds at specific anatomical locations through a stethoscope.
Normal Heart Sounds
S1 (First Heart Sound)-
S1 is made by the closure of the mitral and tricuspid valves (atrioventricular valves), marking the beginning of systole.
S2 (Second Heart Sound)-
S2 is made by the closure of the aortic and pulmonic valves (semilunar valves), marking the end of the systole.
Normal Heart Sounds
S1 (First Heart Sound)-
S1 is made by the closure of the mitral and tricuspid valves (atrioventricular valves), marking the beginning of systole.
S2 (Second Heart Sound)-
S2 is made by the closure of the aortic and pulmonic valves (semilunar valves), marking the end of the systole.
Cardiovascular System Abnormal Findings I: Inspection and Palpation
In a cardiovascular examination, inspection and palpation are crucial for identifying abnormalities.
Abnormal findings observed during an inspection
Abnormal findings observed during an inspection
Cardiovascular System Abnormal Findings II: Auscultation
Auscultation, an essential part of a heart examination, is done using a stethoscope. It provides crucial information about heart function and possible heart problems. Due to heart problems, abnormal sounds can be heard during systole or diastole. These sounds include S3 and S4 gallops, opening snaps, systolic clicks, and murmurs.
Abnormal Heart Sounds
Gallops:
Abnormal Heart Sounds
Gallops:
Mitral Regurgitation I: Introduction
Mitral regurgitation is characterized by the backward circulation of blood from the left ventricle to the left atrium during systole, a phase of the cardiac cycle when the heart contracts and pumps blood out of the chambers. This abnormal flow occurs primarily due to the dysfunction of the mitral valve or its supporting structures, which include the mitral leaflets, chordae tendineae, annulus, and papillary muscles.Etiology and Mechanisms:Primary Mitral Regurgitation: This type arises from...


