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Published on: August 8, 2013
[Serum troponin I level in patients with hypertrophic cardiomyopathy]
1Department of Cardiology, Beijing Anzhen Hospital, Capital Medicine University, Beijing 100029, China.
Insights
Serum troponin I (TNI) levels are elevated in about half of hypertrophic cardiomyopathy (HCM) patients, particularly those with chest pain or T wave inversion. This finding aids in differentiating HCM from acute coronary syndrome.
Area of Science:
- Cardiology
- Biomarkers
- Cardiovascular Diseases
Context:
- Hypertrophic cardiomyopathy (HCM) is a complex cardiac condition.
- Serum troponin I (TNI) is a cardiac biomarker.
- Distinguishing HCM from acute coronary syndrome (ACS) is clinically significant.
Purpose:
- To investigate serum troponin I (TNI) levels in patients diagnosed with hypertrophic cardiomyopathy (HCM).
Summary:
- A prospective study analyzed 612 HCM patients, measuring serum TNI in 116.
- Elevated TNI levels were observed in 53.4% of patients.
- Higher TNI correlated with ventricular wall depth, T-wave inversion, and chest pain, independent of coronary artery disease.
Impact:
- Elevated serum TNI in HCM patients, especially those with chest pain or T-wave inversion, is common.
- This finding is crucial for differentiating HCM from ACS, improving diagnostic accuracy.
- Highlights the importance of considering TNI in the context of HCM symptoms and ECG findings.
Objective:
To observe serum troponin I (TNI) level in patients with hypertrophic cardiomyopathy (HCM).
Method:
Six hundreds and twelve HCM patients were analyzed prospectively from January 1990 to November 2007.Ultracardiography were detected for all the patients. The diagnostic criteria of HCM is ventricular wall thickness more than 15 mm. Serum TNI level was measured in 116 patients with HCM. Clinical data including age, gender, history, main symptoms, NYHA grade, coronary angiograph, electrocardiogram and echocardiography were compared between patients with normal and increased TNI levels.
Results:
In 116 patients who detected TNI, 62 of them (53.4%) had a degree higher than normal. The median TNI value of all these patients is 0.07 ng/ml (0 - 4.38 ng/ml). Sixty-nine patients (59.5%) had undergone coronary angiography. Only 9 of them (13.0%) could be diagnosised as coronary heart disease. The TNI values of HCM patients with or without coronary heart disease were similar. The factors related to a higher TNI value included maximal depth of ventricule (P < 0.05), significant T inversion (P < 0.01) and chest pain (P < 0.05). Compared to all the 612 patients, the ones who detected serum TNI were likely to have chest pain (45.7% vs. 34.5%, P < 0.01) and significant T inversion (75.9% vs. 30.1%, P < 0.01).
Conclusion:
Increased serum TNI could be seen in half of HCM patients, especially in those patients with chest pain or significant T inversion. It is therefore important to different these patients from patients with acute coronary syndrome.
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