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  • Is NT-proBNP reliable...

Is NT-proBNP reliable for heart failure diagnosis in Indian patients? Study provides insights

Medha BaranwalWritten by Medha Baranwal Published On 2022-09-19T19:30:59+05:30  |  Updated On 19 Sep 2022 2:01 PM GMT
Is NT-proBNP reliable for heart failure diagnosis in Indian patients? Study provides insights

Maharashtra: NT-proBNP can help diagnose heart failure (HF) but only in addition to clinical findings, a recent study published in the Journal of the Association of Physicians of India has concluded. This was based on the observation that in addition to LVEF, the values of N-terminal pro-BNP (NT-proBNP) vary with factors like BMI, age, and creatinine clearance. This may lead to a...

Maharashtra: NT-proBNP can help diagnose heart failure (HF) but only in addition to clinical findings, a recent study published in the Journal of the Association of Physicians of India has concluded. 

This was based on the observation that in addition to LVEF, the values of N-terminal pro-BNP (NT-proBNP) vary with factors like BMI, age, and creatinine clearance. This may lead to a falsely positive or falsely negative diagnosis of HF. 

Heart failure diagnosis essentially remains clinical-based. However, the history, physical examination, and chest radiograph findings are often not adequate in the diagnosis because other conditions that affect the cardiopulmonary system mimic HF symptoms. NT-proBNP has long been used for HF diagnosis. N-terminal pro-BNP values vary with different patient parameters. However, with the use of newer drugs like angiotensin receptor neprilysin inhibitor (ARNI), it becomes important to have data from the Indian population keeping in view the scarcity of Indian studies on this topic. 

Against the above background, Indian researchers Bahaar Athavale and Jaya Pathak conducted an observational prospective study with the following objectives: (i) To assess the NT-proBNP role in the HF diagnosis. (ii) Achieve diagnostic clarity in cases having cardiorespiratory symptoms and signs like acute onset dyspnea, pedal edema, and basal crepitations. (iii) To study the effect of various factors like body mass index (BMI), age, and creatinine on NT-proBNP. (iv) Establish a relation between NT-proBNP levels and left ventricular ejection fraction (LVEF), disease severity, and etiology of HF.

After fulfilling inclusion and exclusion criteria over a period of 10 months, the researchers included 50 patients presenting with acute onset breathlessness. Detailed history and examination of the patients were obtained. Within 24 hours of the onset of symptoms, a collection of venous samples for the measurement of NT-proBNP was done. Other relevant blood and radiographic investigations were obtained.

"Rule in" or "rule out" HF was done on the basis of the NT-proBNP "cut-offs" set forth by the American Heart Association (AHA)/American College of Cardiology (ACC). The diagnosis was confirmed using two-dimensional echocardiography (2D Echo). The correlation between NT-proBNP and various parameters like age, creatinine, BMI, and LVEF was obtained. Sensitivity and specificity tests were applied as well. 

Key findings of the study include:

· Out of the 50 patients presenting with acute onset dyspnea, the most common cause was ischemic heart disease (IHD) (44%) followed by dilated cardiomyopathy (DCM) (32%), chronic obstructive pulmonary disease (COPD) (10%), anemia (4%), followed by other causes.

· The median NT-proBNP value was the highest for IHD patients (9485 pg/mL), followed by DCM (8969 pg/mL), followed by COPD (2846 pg/mL), and followed by anemia (850 pg/mL).

· There is a significant positive correlation between NT-proBNP and age.

· There is a significant negative correlation between creatinine clearance and NT-proBNP.

· There was a significant negative correlation between LVEF and NT-proBNP.

· Higher LVEF is associated with lower NT-proBNP values. There is marked heterogeneity in the values though.

From the above findings, it can be seen that NT-proBNP values vary with factors like age, BMI, and creatinine clearance in addition to LVEF. This may lead to the falsely positive or falsely negative diagnosis of HF. 

"With the above observations in mind, it can be concluded that NT-proBNP can help diagnose HF but only in addition to clinical findings," the authors concluded in their study. 

"Although NT-ProBNP has a well-established role as a diagnostic marker, prospective studies are desirable on the same as a prognostic marker in the area of HF," they wrote. 

Reference:

Athavale B, Pathak J. Study of the Role of Plasma NT-proBNP in the Diagnosis of Heart Failure. J Assoc Physicians India 2022;70(7):38–42.

Journal of the Association of Physicians of India heart failure NT-proBNP 
Source : Journal of the Association of Physicians of India
Medha Baranwal
Medha Baranwal

    MSc. Biotechnology

    Medha Baranwal joined Medical Dialogues as an Editor in 2018 for Speciality Medical Dialogues. She covers several medical specialties including Cardiac Sciences, Dentistry, Diabetes and Endo, Diagnostics, ENT, Gastroenterology, Neurosciences, and Radiology. She has completed her Bachelors in Biomedical Sciences from DU and then pursued Masters in Biotechnology from Amity University. She has a working experience of 5 years in the field of medical research writing, scientific writing, content writing, and content management. She can be contacted at  editorial@medicaldialogues.in. Contact no. 011-43720751

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