在马拉松跑步和心肌梗塞后,心脏中托罗邦素释放的组成不同
K E Juhani Airaksinen1,2, Tuomas Paana2, Tuija Vasankari3,2
1University of Turku, Turku, Finland juhani.airaksinen@tyks.fi.
Open heart
|November 17, 2024
概括
在马拉松跑完之后,心脏中托罗素T (cTnT) 的水平与肌肉梗塞 (MI) 的水平有所不同. 运动后的cTnT大多是碎片化的,与MI不同,其中完整的形式占主导地位.
科学领域:
- 心脏病学 心脏病学
- 运动生理学 运动生理学
- 生物化学 生物化学
背景情况:
- 心脏中多素T (cTnT) 的升高在剧烈运动后很常见.
- 运动后释放的cTnT的组成还不清楚.
- 从临床上来看,区分运动诱导的cTnT与心肌梗塞 (MI) 是非常重要的.
研究的目的:
- 为了比较马拉松比赛后释放的cTnT的分子组成与急性心肌梗塞 (MI) 期间释放的分子组成.
- 为了研究马拉松跑者和心脏病患者中cTnT碎片化的程度.
主要方法:
- 分析了来自45名马拉松运动员和84名1型心脏病发作患者的血样本.
- 一种新型免疫试验测量了长 cTnT (完好无损/轻微碎片化),而一项商业试验测量了总 cTnT.
- 长时间和总cTnT的比率 (热素比率) 被计算出来以评估碎片化.
主要成果:
- 82%的跑步者总体cTnT (>14 ng/L) 的升高.
- 与心脏病患者 (0.62) 相比,跑步者表现出显著较低的热素比率 (0.17),这表明碎片化程度更大.
- 较高的热素释放与跑步者的较低的热素比率相关,但在心脏病发作患者中较高的比率.
结论:
- 在艰苦的运动后,循环中的cTnT主要是碎片化的,与1型MI不同,其中完整的形式更为普遍.
- 热波组成的差异在较高的热波释放水平时更加明显.
- 这种独特的cTnT形状可能有助于区分运动引起的升高和急性心脏病发作.
相关概念视频
Blood Studies for Cardiovascular System I: Cardiac Biomarkers
103
Cardiac biomarkers are enzymes, proteins, and hormones released into the blood when cardiac cells are injured. They are powerful tools for triaging.
The essential diagnostic tools for detecting myocardial necrosis and monitoring individuals suspected of having acute coronary syndrome (ACS) include:
Troponins
Troponins, particularly cardiac troponins I and T, are the most precise and sensitive markers of myocardial injury. They are detectable within 4-6 hours of myocardial injury and remain...
The essential diagnostic tools for detecting myocardial necrosis and monitoring individuals suspected of having acute coronary syndrome (ACS) include:
Troponins
Troponins, particularly cardiac troponins I and T, are the most precise and sensitive markers of myocardial injury. They are detectable within 4-6 hours of myocardial injury and remain...
103
Myocarditis I: Introduction
2
Myocarditis is inflammation of the myocardium, which is the muscular layer of the heart.EtiologyMyocarditis has a diverse etiology, including a wide range of infectious and non-infectious causes:Infectious CausesViral: Common viruses include Coxsackie A and B, adenovirus, parvovirus B19, enteroviruses, and influenza A.Bacterial: Examples include infections caused by Streptococcus, Staphylococcus, and Mycoplasma species.Rickettsial: Infections like Rocky Mountain spotted fever can result in...
2
Myocarditis II: Clinical features and Diagnostic Tests
2
Myocarditis is an inflammation of the heart muscle. The symptoms vary widely, encompassing asymptomatic presentations to severe, acute manifestations.Clinical PresentationAsymptomatic cases: In some instances, myocarditis may be asymptomatic, with the infection resolving without intervention. These cases often go undetected unless discovered incidentally through diagnostic imaging or tests conducted for other reasons.General Early Symptoms: Early symptoms of myocarditis are non-specific and can...
2
Blood Studies for Cardiovascular System II: CRP, Hcy, and Cardiac Natriuretic Peptide Markers
60
Cardiac biomarkers are critical in diagnosing, prognosing, and managing cardiovascular diseases. Routine measurement of specific biomarkers such as B-type natriuretic peptide (BNP), C-reactive protein (CRP), and homocysteine (Hcy) is common practice in clinical settings to evaluate heart function and predict cardiovascular events.
These markers indicate stress or strain on the heart muscle:
Natriuretic Peptides (BNP)
Cardiac myocytes produce these hormones in response to ventricular stretching...
These markers indicate stress or strain on the heart muscle:
Natriuretic Peptides (BNP)
Cardiac myocytes produce these hormones in response to ventricular stretching...
60
Exercise and Cardiovascular Response
739
Exercise significantly impacts cardiovascular response, which is crucial for understanding patient health and designing effective treatment plans.
Light to moderate physical activity initiates a series of interconnected responses in the body. The heart rate modestly increases in anticipation of the workout, followed by widespread vasodilation as oxygen consumption by skeletal muscles increases. This results in decreased peripheral resistance, increased capillary blood flow, and accelerated...
Light to moderate physical activity initiates a series of interconnected responses in the body. The heart rate modestly increases in anticipation of the workout, followed by widespread vasodilation as oxygen consumption by skeletal muscles increases. This results in decreased peripheral resistance, increased capillary blood flow, and accelerated...
739
Pathophysiology of Cardiac Performance
574
Typical heart performance is influenced by heart rate, rhythm, myocardial contraction, and metabolism or blood flow. The cardiac muscle exhibits distinct electrophysiological features, including pacemaker activity and calcium channel control, which play a vital role in the heart's response to various drugs. The autonomic nervous system, comprising the sympathetic and parasympathetic branches, regulates heart rate. Sympathetic activation increases heart rate, while parasympathetic activation...
574


