Nghiên cứu đánh giá chức năng tâm trương thất trái theo khuyến cáo ASE/EACVI 2016 ở bệnh nhân bệnh cơ tim giãn

Author(s):  
Quang Tuan Pham

TÓM TẮT Mục tiêu: Khảo sát chức năng tâm trương thất trái theo khuyến cáo ASE/EACVI 2016 ở bệnh nhân bệnh cơ tim giãn bằng siêu âm tim. Tìm hiểu mối liên quan giữa chức năng tâm trương thất trái với tình trạng giãn thất trái, độ suy tim NYHA, phân suất tống máu thất trái, phân suất co cơ thất trái. Đối tượng và phương pháp nghiên cứu: Nghiên cứu mô tả cắt ngang trên 56 bệnh nhân bệnh cơ tim giãn nguyên phát được nhập viện và điều trị tại bệnh viện Trung ương Huế từ tháng 4/2018 đến tháng 8/2020. Kết quả: Đường kính thất trái cuối tâm trương và cuối tâm thu trung bình là 66,11 ± 7,3 mm và 57,7 ± 8,02 mm. Đường kính nhĩ trái trung bình là 40,61 ± 7,65 mm. Phân suất tống máu thất trái trung bình là 24,68 ± 5,97 %. Phân suất co cơ thất trái trung bình là 12,91 ± 4,55 %. Tất cả các bệnh nhân nhóm nghiên cứu đều có rối loạn chức năng tâm trương thất trái. Chiếm tỷ lệ cao nhất là rối loạn chức năng tâm trương độ II (44,6%), tiếp sau là rối loạn chức năng tâm trương độ III (35,8%) và rối loạn chức năng tâm trương độ I là 19,6%. Không có sự liên quan có ý nghĩa thống kê giữa mức độ rối loạn tâm trương thất trái với đường kính thất trái cuối thì tâm thu và tâm trương (p > 0,05). Có mối liên quan giữa rối loạn chức năng tâm trương thất trái với các thông số phân suất tống máu EF và phân suất co cơ FS (p < 0,005). Có sự tương quan thuận mức độ vừa giữa phân độ rối loạn chức năng tâm trương thất trái với phân độ suy tim theo NYHA với r = 0,445, sự tương quan đó có ý nghĩa thống kê (p < 0,001). Kết luận: Tất cả các bệnh nhân bệnh cơ tim giãn trong nhóm nghiên cứu đều có rối loạn chức năng tâm trương thất trái, chủ yếu là rối loạn chức năng tâm trương nặng độ II - III. Sự rối loạn này thể hiện rõ qua sự biến đổi các thông số đánh giá chức năng tâm trương thất trái trên siêu âm tim theo khuyến cáo ASE/ EACVI 2016, một khuyến cáo mới đưa ra nhằm tiếp cận đánh giá chức năng tâm trương một cách thuận tiện và dễ dàng hơn. Từ khóa: Bệnh cơ tim giãn, rối loạn chức năng tâm trương thất trái, khuyến cáo ASE/EACVI 2016 ABSTRACT EVALUATION OF LEFT DYSTOLIC FUNCTION ACCORDING TO THE RECOMMENDATION ASE/EACVI 2016 INPATIENTS WITH DILATED CARDIOMYPAHTIES Background: Dilated cardiomyopathy is a disease of the heart muscle, characterized by dilatation of the heart chamber and a dysfunction of the left or both ventricles. It often leads to progressive heart failure, and is the leading cause of heart transplant among all cardiomyopathy. The annual rate of sudden cardiac death in dilated cardiomyopathy is 2 - 4%, with sudden death accounting for half of all deaths [9]. Echocardiography is an evaluation of a patient with dilated cardiomyopathy. There have been many studies on dilated cardiomyopathy in the world. However, there are still few studies evaluating diastolic function in patients with dilated cardiomyopathy using cardiac Doppler echocardiography. Experts around the world have made many recommendations in assessing left ventricular diastolic function, most recently is the recommendation ASE/EACVI 2016. Comparing with the 2009 EAE/ASE recommendation, the recommendation ASE/EACVI 2016 for assessment of left ventricular diastolic function has fewer parameters, so it is easier to implement and more convenient in clinical practice. Objective: Surveying left ventricular diastolic function according to the recommendation ASE/EACVI 2016 in patients with dilated cardiomyopathy by echocardiography and investigating the relationship between left ventricular diastolic function with left ventricular dilatation, heart failure NYHA, left ventricular ejection fraction, left ventricle fractional shortening. Methods: Research was designed as a cross - sectional descriptive study. Studied on 56 patients with primary dilated cardiomyopathy were hospitalized and treated at Hue Central Hospital. Results: The results showed: The mean end - diastolic and end - systolic left ventricular diameters were 66,11 ± 7,3 mm and 57,7 ± 8,02 mm. The mean left atrial diameter was 40,61 ± 7,65 mm. The mean left ventricular ejection fraction was 24,68 ± 5,97%. The mean fractional shortening of left ventricular contraction was 12,91 ± 4,55%. All patients in the study group had left ventricular diastolic dysfunction. The highest proportion is diastolic dysfunction grade II (44,6%), followed by diastolic dysfunction grade III (35,8%) and diastolic dysfunction grade I is 19,6%. There was no statistically significant relationship between the classification of left ventricular diastolic dysfunction and left ventricular systolic and diastolic diameter (p > 0.05). There is a relationship between left ventricular diastolic dysfunction and parameters of ejection fraction EF and contraction fraction FS (p < 0.005). There is a moderate positive correlation between the classification of left ventricular diastolic dysfunction and the heart failure rating according to NYHA (r = 0,445, p < 0,001). Conclusion: All patients in the study group had left ventricular diastolic dysfunction, mostly grade II and grade III diastolic dysfunction. This disorder is clearly demonstrated by the change in the parameters of the left ventricular diastolic function assessment on echocardiography according to the 2016 ASE/ EACVI recommendations, a new recommendation introduced to approach the assessment of diastolic functionmore convenient and easier way. Key words: Dilated cardiomyopathy, left ventricular diastolic dysfunction, the recommendation ASE / EACVI 2016.

Circulation ◽  
2014 ◽  
Vol 130 (suppl_2) ◽  
Author(s):  
Tadafuni Sugimoto ◽  
Kaoru Dohi ◽  
Katsuya Onishi ◽  
Masahide Horiguchi ◽  
Takeshi Takamura ◽  
...  

Introduction: Endothelial dysfunction plays a central role in the pathogenesis of diabetic vascular disease. Hypothesis: Although resultant left ventricular diastolic dysfunction is hypothesized to reduce exercise capacity, limited data exist on the relation between endothelial function, left ventricular diastolic function and exercise capacity in patients with type 2 diabetes. Methods: We recruited 231 subjects with type 2 diabetes, a preserved ejection fraction, a negative stress test and a sodium-restricted diet. All subjects underwent a brachial artery flow-mediated dilation (FMD) measurement, a transthoracic echocardiography and a standard submaximal Bruce protocol treadmill exercise test during the hospitalization period for diabetes education program. Results: Impaired FMD (%FMD 8) were found in 193 subjects (84%) and 174 subjects (75%), respectively, of which 11 (5%) had diastolic dysfunction (E/E’ >15). Mean E/E’ by quartile (Q) were: Q1 6.9, Q2 8.9, Q3 10.4, and Q4 14.0. E/E’ was inversely correlated with %FMD (2.9 ± 4.3%, r = -0.19, p = 0.003) and exercise duration (460 ± 150 sec, r = -0.30, p <0.001). Compared with subjects in Q4, those in Q1, Q2 and Q3 had longer exercise duration (Q1 500 ± 150 sec, Q2 510 ± 140 sec, Q3 460 ± 140 sec and Q4 390 ± 140 sec, p <0.001). After adjustment for potential confounders including age, gender, smoking, body mass index, medication for hypertension, diabetes duration of more than 5 years, HbA1c and systolic blood pressure, %FMD and exercise duration were significantly associated with E/E’ (β = -0.17 and -0.18, p = 0.006 and 0.014) in all subjects. Conclusions: Diabetes patients with impaired endothelial function have impaired left ventricular diastolic function potentially leading to exercise intolerance.


2019 ◽  
Vol 5 (1) ◽  
pp. 44
Author(s):  
Sheila Dhiene Putri ◽  
Harris Hasan ◽  
Refli Hasan ◽  
A. Afif Siregar ◽  
Nizam Akbar ◽  
...  

Background: Diastolic dysfunction as part of heart failure with preserved ejection fraction (HFpEF) has gain interests, due to the increasing prevalence rate and poor prognosis. Besides the mechanism is not fully understood, there are some difficulties in detecting the presence of diastolic dysfunction. Previous studies have shown correlation between some electrocardiographic parameters and diastolic function. Furthermore, the aim of this study is to assess the diagnostic value of the QTc interval in detecting left ventricular diastolic dysfunction.Methods: A cross sectional study was conducted on patients with clinical suspicion of heart failure. Electrocardiographic examination was performed to obtain QTc interval (msec) using the Bazett formula. Left ventricular diastolic function was assessed using Tissue Doppler Imaging by echocardiography. Using correlation test and ROC method, the relationships between QTc interval and LV diastolic function were investigated.Results: Of 82 patients analyzed, there were 62 patients (75.9%) known to have diastolic dysfunction. The QTc interval was found to be longer in the group with diastolic dysfunction compared to the normal group (442.9±27 vs. 402.1±18.2, p <0.001). There was a strong negative correlation between the QTc interval and diastolic function (r = -0.619; p <0.001). Using ROC analysis, the cut off point for QTc interval was 410 ms with 91% sensitivity, 70% specificity, and 90% positive predictive value.Conclusion: The QTc interval is an accurate, simple and highly feasible electrocardiographic parameter as a screening tool to determine the presence of left ventricular diastolic dysfunction.


Author(s):  
Casandra L. Niebel ◽  
Kelley C. Stewart ◽  
Takahiro Ohara ◽  
John J. Charonko ◽  
Pavlos P. Vlachos ◽  
...  

Left ventricular diastolic dysfunction (LVDD) is any abnormality in the filling of the left ventricle and is conventionally evaluated by analysis of the relaxation driven phase, or early diastole. LVDD has been shown to be a precursor to heart failure and the diagnosis and treatment for diastolic failure is less understood than for systolic failure. Diastole consists of two filling waves, early and late and is primarily dependent on ventricular relaxation and wall stiffness.


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