scholarly journals Incremental Value of Left Ventricular Mechanical Dyssynchrony Assessment by Nitrogen-13 Ammonia ECG-Gated PET in Patients With Coronary Artery Disease

2021 ◽  
Vol 8 ◽  
Author(s):  
Danzha Zheng ◽  
Yanyun Liu ◽  
Lei Zhang ◽  
Fan Hu ◽  
Xubo Tan ◽  
...  

Background: Phase analysis is a technique used to assess left ventricular mechanical dyssynchrony (LVMD) in nuclear myocardial imaging. Previous studies have found an association between LVMD and myocardial ischemia. We aim to assess the potential diagnostic value of LVMD in terms of myocardial viability, and ability to predict major adverse cardiac events (MACE), using Nitrogen-13 ammonia ECG-gated positron emission tomography (gPET).Methods: Patients with coronary artery disease (CAD) who underwent Nitrogen-13 ammonia and Fluorine-18 FDG myocardial gPET were enrolled, and their gPET imaging data were retrospectively analyzed. Patients were followed up and major adverse cardiac events (MACE) were recorded. The Kruskal-Wallis test and Mann-Whitney U test were performed to compare LVMD parameters among the groups. Binary logistic regression analysis, receiver operating characteristic (ROC) curve analysis, and multiple stepwise analysis curves were applied to identify the relationship between LVMD parameters and myocardial viability. Kaplan–Meier survival curves and the log-rank test were used to look for differences in the incidence of MACE.Results: In total, 79 patients were enrolled and divided into three groups: Group 1 (patients with only viable myocardium, n = 7), Group 2 (patients with more viable myocardium than scar, n = 33), and Group 3 (patients with less viable myocardium than scar, n = 39). All LVMD parameters were significantly different among groups. The median values of systolic phase standard deviation (PSD), systolic phase histogram bandwidth (PHB), diastolic PSD, and diastolic PHB between Group 1 and Group 3, and Group 2 and Group 3 were significantly different. A diastolic PHB of 204.5° was the best cut-off value to predict the presence of myocardial scar. In multiple stepwise analysis models, diastolic PSD, ischemic extent, and New York Heart Association (NYHA) classification were independent predictive factors of viable myocardium and myocardial scar. The incidence of MACE in patients with diastolic PHB > 204.5° was 25.0%, higher than patients with diastolic PHB <204.5° (11.8%), but the difference was not significant.Conclusions: LVMD generated from Nitrogen-13 ammonia ECG-gated myocardial perfusion imaging had added diagnostic value for myocardial viability assessment in CAD patients. LVMD did not show a definite prognostic value.

2021 ◽  
Vol 11 (2) ◽  
pp. 131-136
Author(s):  
F. Bekmetova ◽  
Kh. Fozilov ◽  
Sh. Doniyorov ◽  
R. Alieva ◽  
M. Mukhamedova ◽  
...  

The purpose of this study was to assess the properties of left ventricular myocardial deformation in patients with coronary artery disease (CAD) with various degrees of coronary lesions. Methods and Results: The study included 74 patients with stable angina pectoris Class II-IV aged between 40 and 70 years. All patients underwent the following examinations: assessment of traditional risk factors, physical examination, general clinical and laboratory blood tests, 12-lead ECG, 24-hour ABPM, transthoracic echocardiography, two-dimensional speckle tracking echocardiography (STE), and coronary angiography (CAG). The SYNTAX score was calculated retrospectively according to the SYNTAX score algorithm. All patients were divided into 3 groups: Group 1 included 21 patients with a low SYNTAX score (0–22), for whom standard drug therapy was recommended; Group 2 included 28 patients with an intermediate SYNTAX score (23–32), to whom PCI was recommended; Group 3 included 25 patients with a high SYNTAX score (≥33), to whom CABG was recommended. Left ventricular ejection fraction (LVEF) obtained using the modified biplane Simpson's method was significantly lower in Group 3 than in Groups 1 and 2 (P=0.001); it should be noted that this indicator was within the normative values in Groups 1 and 2, and belonged to the gradation “mild dysfunction.” A more objective quantitative assessment of the contractile function of the LV myocardium was obtained by assessing the GLS and SR. The comparative analysis of the LV myocardial deformation properties in the three studied groups showed that in Group 3 the GLS and SR indicators were significantly lower than in Group 1 (P=0.000 and P=0.0020). Moreover, GLS (global longitudinal strain) and SR (strain rate) were significantly higher in Group 1 than in Group 2 (P=0.0001 and P=0.0133, respectively). GLS significantly correlated with LVEF (r=0.57; P<0.05), E/A (r=0.22; P<0.05), and SYNTAX score (r=-0.63; P<0.05). SR significantly correlated with LVEF (r=0.49; P<0.05) and SYNTAX score (r=-0.37; P<0.05) Conclusion: The results obtained indicate the diagnostic value of STE with the determination of GLS and SR in a comprehensive assessment of the severity of SAD. GLS and SR significantly correlate with the clinical course of the disease, as well as indicators of LV remodeling and LV diastolic dysfunction. STE analysis of GLS and SR has incremental diagnostic value over transthoracic echocardiography in predicting significant CAD.


2021 ◽  
Author(s):  
Baotao Huang ◽  
Lu Yang ◽  
Bosen Yang ◽  
Fangyang Huang ◽  
Qianfeng Xiao ◽  
...  

Abstract Background and aimsLeft ventricular hypertrophy (LVH) is prevalent in obese individuals. Besides, both of LVH and obesity is associated with subclinical LV dysfunction. However, little is known about the interplay between body fat and LVH in relation to all-cause death in patients with coronary artery disease (CAD).MethodsIn this retrospective cohort study, a total of 2243 patients with angiographically proven CAD were included. Body fat and LV mass were calculated using formulas. Higher body fat was defined as the percentage of body fat was greater than 75th percentile. LVH was defined according to guidelines’ definition. Patients were divided into four groups: group 1, lower body fat and no LVH; group 2, lower body fat and LVH; group 3, higher body fat and no LVH; group 4, higher body fat and LVH. Cox-proportional hazard models were used to observe the interaction effect of body fat and LVH on all-cause death.ResultsOver 2.2 years, there were 120 deaths. Patients with higher body fat and no LVH (group 3) had similar risk of death (adjusted HR 1.83, 95%CI 1.00-3.38, P = 0.054) compared to the reference group (group 1), while patients with lower body fat and LVH (group 2) had the highest risk (adjusted HR 2.15, 95%CI 1.26–3.64, P = 0.005) of death. The results were robust after different degree of adjustment.ConclusionCertain amount of BF was not associated with increased risk of all-cause death in patients with CAD, even seems protective in those concomitant with LVH.


2012 ◽  
Vol 2012 ◽  
pp. 1-13 ◽  
Author(s):  
Adel Shabana ◽  
Ayman El-Menyar

Some patients with chronic ischemic left ventricular dysfunction have shown significant improvements of contractility with favorable long-term prognosis after revascularization. Several imaging techniques are available for the assessment of viable myocardium, based on the detection of preserved perfusion, preserved glucose metabolism, intact cell membrane and mitochondria, and presence of contractile reserve. Nuclear cardiology techniques, dobutamine echocardiography and positron emission tomography are used to assess myocardial viability. In recent years, new advances have improved methods of detecting myocardial viability. This paper summarizes the pathophysiology, methods, and impact of detection of myocardial viability, concentrating on recent advances in such methods. We reviewed the literature using search engines MIDLINE, SCOUPS, and EMBASE from 1988 to February 2012. We used key words: myocardial viability, hibernation, stunning, and ischemic cardiomyopathy. Recent studies showed that the presence of viable myocardium was associated with a greater likelihood of survival in patients with coronary artery disease and LV dysfunction, but the assessment of myocardial viability did not identify patients with survival benefit from revascularization, as compared with medical therapy alone. This topic is still debatable and needs more evidence.


Author(s):  
Dr. Ankit Kumar ◽  
Dr. Arun Kumar Kulshrestha

INTRODUCTION: In some individual’s suffering from hypertension, coronary artery disease, cerebrovascular disease, myocardial infarction and thyrotoxicosis, these hemodynamic stress responses can turn into life-threatening conditions like left ventricular failure, myocardial ischemia, cerebral hemorrhage, and ruptured cerebral aneurysm. Different drugs like lidocaine, vasodilator agents inhibiting sympathoadrenal response, α-and β-adrenergic blockers, and opioids can be administered prior to tracheal intubation to prevent hemodynamic responses. But higher dose of lignocaine may lead to hypotension, bradycardia, and hypoxia in patients. Due to various effect of these drugs on hemodynamic changes in patients this study was carried out to evaluate the effects of IV esmolol, lignocaine, and labetalol for attenuation of hemodynamic response to laryngoscopy and intubation. MATERIAL AND METHODS: A total of 90 consecutive patients were included in the study and were grouped in to, lignocaine group, labetalol and esmolol group containing 30 patients each. Age group 21–65 years of either sex or American Society of Anesthesiologists (ASA) Grade I or II scheduled for various general surgical procedures under endotracheal anesthesia were included in this study. Patients excluded were pregnant and lactating women, morbid obesity, and hypertension. RESULTS: Mean Age in Group 1, group2 and group 3 was 40.38 ± 7.25, 43.8 ± 9.24 and 42.56 ± 8.71 respectively while weight was 62.41 ± 7.32, 63.63 ± 8.11 and 60.74 ± 6.92 respectively. There were 17 male and 13 female in group 1, 19 male and 11 female in group 2 and 16 male and 14 female in group 3. Attenuation of blood pressure was more in labetalol group. Reduction of heart rate in labetalol group was significant. It is seen that Labetalol was more effective at attenuation of diastolic blood pressure among all drugs. Mean arterial pressure was not much reduced lignocaine and esmolol group as compared to labetalol. CONCLUSION: Haemodynamic alterations are usually observed during laryngoscopy and endotracheal intubation. In our study it was found that as labetalol is a safe and effective drug, for attenuation of sympathomimetic response.


2018 ◽  
Vol 59 (4) ◽  
pp. 285-290
Author(s):  
Hasan A. Farhan

treatment decisions for percutaneous coronary intervention (PCI) and/or coronary artery bypass graft (CABG) in patients with complex coronary artery disease (CAD) and/or unprotected left main stem disease (ULMSD).Objectives: To assess the agreement between the clinical decisions of the cardiologist and the SS II recommendation regarding the revascularization strategies in patients with complex CAD and/or ULMSD.Patients and Methods: Prospective data from patients who presented to Baghdad Medical City Catheterization Labs for coronary angiography and were followed up between January 2014 and November 2015 were analyzed. For these patients, SS II was assessed by the two anatomical variables (SS and presence of ULMSD) and six clinical variables (age, creatinine clearance, left ventricular ejection fraction, sex, chronic obstructive pulmonary disease, and peripheral vascular disease) to predict 4-year mortality after revascularization with PCI and/or CABG. These scores were then compared with the clinical decisions of cardiologists. After 1 year of data collection, we followed up the patients by phone to assess their mortality status. Patients were categorized into three groups according the interventional procedures: Group 1 (for PCI), Group 2 (for CABG), and Group 3 (for PCI vs. CABG).Results: Two hundred patients were enrolled. Their mean age was 60.23 ± 9.836 years, and 157 (78.5%) were men. Depending on the clinical judgment of the cardiologist, 71 (35.5%) patients were referred for PCI (Group 1), 119 (59.5%) patients for CABG (Group 2), and the remaining 10 (5%) patients for PCI vs. CABG (Group 3). Based on an assessment of 4-year mortality by the SS II, CABG would have been the treatment of choice in 67 (33.5%) patients, PCI in 30 (15%) patients, and both the treatments in 103 (51.5%) patients. There was a concordance between the clinical decision of the cardiologist and SS II in 67 (33.5%) patients and discordance in 133 (66.5%) patients. Six patients died within 1 year, most of whom were from the discordant group.Conclusion: There was a statistically significant discordance between the SS II recommendation and clinical judgment of the interventional cardiologist. SS II proved to be a useful objective tool to assist experienced clinical judgment in determining appropriate revascularization strategy for CAD patients. المقدمة:درجة السنتاكس ٢ تعد طريقة ارشادية لاختيار طريقة العلاج في المرضى اللذين يعانون من امراض شرايين القلب التاجية المعقدة مع او بدون امراض الشريان الايسر الرئيسي غير المحمي. الهدف: لتقييم نسبة عدم التوافق بين القرار السريري لاختصاصي القلبية وتوصيات درجة السنتاكس ٢ بالنسبة لخطة العلاج في المرضى المصابين بآمراض شرايين القلب التاجية المعقدة مع او بدون امراض الشريان الايسر الرئيسي غير المحمي.                        طرائق البحث: يتم جمع معلومات المرضى اللذين يخضعون لاجراء القسطرة التشخيصية لشرايين القلب في صالات القسطرة في مدينة الطب وتتم متابعة المرضى ايضا وتكون مدة الدراسة للفترة من شهر كانون الثاني لسنة ٢٠١٤م الى شهر تشرين الثاني لسنة ٢٠١٥م وخلال هذه الفترة يتم تقييم المرضى عن طريق درجة السنتاكس ٢ وست متغيرات سريرية للتنبؤ بآحتمالية حدوث الوفاة خلال الاربع سنوات بعد عودة التوعي ومقارنتها مع القرار السريري لاختصاصي القلبية. ثم بعد مرور سنة على جمع الداتا، نقوم بمتابعة حالة المرضى عن طريق الاتصال الهاتفي لمعرفة إذا حدثت حالات الوفاة. يتم تقسيم المرضى الى ٣ مجاميع، المجموعة الاولى والتي تخضع للتداخل القسطاري، المجموعة الثانية والتي تخضع لعملية جراحية لزرع شرايين القلب، والمجموعة الثالثة والتي لديها احتمالية للخضوع للقسطرة او للعملية الجراحية.     النتائج: تم اشراك مئتا مريض في الدراسة، معدل العمر ٦٠.٢٣ ± ٩.٨٣٦سنة، ١٥٧ (٧٨.٥٪) من المرضى ذكور. بالاعتماد على القرار السريري لاختصاصي القلبية تم تحديد ٧١ (٣٥.٥٪) من المرضى للخضوع للتداخل القسطاري (المجموعة الاولى)، ١١٩ (٥٩.٥٪) من المرضى تم ارسالهم لاجراء عملية جراحية (المجموعة الثانية) وبقية المرضى ١٠ (٥٪) تم ادراجهم تحت احتمالية خضوعهم للتداخل القسطاري او العملية الجراحية. بالنسبة لتققيم حالة الوفاة للاربع سنوات بالاعتماد على درجة السنتاكس ٢، كانت النتيجة ان العلاج المفضل هو العمليات الجراحية وبنسبة ٣٣.٥٪، في حين ان نسبة المرضى الخاضعين للتداخل القسطاري كانت ١٥٪، وكانت النسبة متوازية بالنسبة للمرضى الخاضعين للعمليات الجراحية او التداخل القسطاري ٥١.٥٪. كان هنالك توافق بين القرار السريري لاختصاصي القلبية ودرجة السنتاكس ٢ وبنسبة ٣٣.٥٪، في حين ان نسبة عدم التوافق للمرضى كانت ٦٦.٥٪. خلال سنة واحدة توفي ستة مرضى ومعضمهم كانوا من مجموعة عدم التوافق.                  الاستنتاج: هذه الدراسة اظهرت عدم توافق هام بين توصيات درجة السنتاكس ٢ والقرار السريري لاختصاصي القلبية.


Author(s):  
Jelena P. Seferovic ◽  
Nebojsa M. Lalic ◽  
Federico Floridi ◽  
Milorad Tesic ◽  
Petar M. Seferovic ◽  
...  

AbstractGalectin-3 is a protein widely distributed in the heart, brain and blood vessels, and has a regulatory role in inflammation, immunology and cancer. Many studies demonstrated that the increased level of galectin-3 is associated with progressive fibrosis and stiffening of the myocardium. The aim of this study was to investigate the role of galectin-3 in patients with type 2 diabetes (T2D) and/or arterial hypertension (HT).Study population included 189 patients, with no coronary artery disease, divided into three groups: group 1 (T2D), group 2 (T2D+HT), and group 3 (HT). All subjects underwent routine laboratory tests, as well as specific biomarkers assessment [galectin-3, glycosylated hemoglobin (HbA1c), N- terminal fragment B-type natriuretic peptide (NT-proBNP)]. Cardiological evaluation included physical examination, transthoracic tissue Doppler echocardiography and stress echocardiography.The results of this study demonstrated significantly increased levels of galectin-3, blood glucose, and HbA1c in group 2. Also, echocardiographicaly, left ventricular (LV) diameters and IVS thickness were increased in this group of patients. Furthermore, in the same cohort a positive correlation between galectin-3 and NT-pro BNP, and galectin-3 and LV mass were demonstrated. In addition, a negative correlation between galectin-3 and LV end-diastolic diameter was revealed.This study revealed that levels of galectin-3 were higher in patients with both T2D and HT, and correlated with LV mass, indicating the potential role of this biomarker for early detection of myocardial structural and functional alterations.


Author(s):  
Dr. H. Kirankumar

INTRODUCTION: In some individual’s suffering from hypertension, coronary artery disease, cerebrovascular disease, myocardial infarction and thyrotoxicosis, these hemodynamic stress responses can turn into life-threatening conditions like left ventricular failure, myocardial ischemia, cerebral hemorrhage, and ruptured cerebral aneurysm. Different drugs like lidocaine, vasodilator agents inhibiting sympathoadrenal response, α-and β-adrenergic blockers, and opioids can be administered prior to tracheal intubation to prevent hemodynamic responses. But higher dose of lignocaine may lead to hypotension, bradycardia, and hypoxia in patients. Due to various effect of these drugs on hemodynamic changes in patients this study was carried out to evaluate the effects of IV esmolol, lignocaine, and labetalol for attenuation of hemodynamic response to laryngoscopy and intubation. MATERIAL AND METHODS: A total of 90 consecutive patients were included in the study and were grouped in to, lignocaine group, labetalol and esmolol group containing 30 patients each. Age group 21–65 years of either sex or American Society of Anesthesiologists (ASA) Grade I or II scheduled for various general surgical procedures under endotracheal anesthesia were included in this study. Patients excluded were pregnant and lactating women, morbid obesity, and hypertension. RESULTS: Mean Age in Group 1, group2 and group 3 was 40.38 ± 7.25, 43.8 ± 9.24 and 42.56 ± 8.71 respectively while weight was 62.41 ± 7.32, 63.63 ± 8.11 and 60.74 ± 6.92 respectively. There were 17 male and 13 female in group 1, 19 male and 11 female in group 2 and 16 male and 14 female in group 3. Attenuation of blood pressure was more in labetalol group. Reduction of heart rate in labetalol group was significant. It is seen that Labetalol was more effective at attenuation of diastolic blood pressure among all drugs. Mean arterial pressure was not much reduced lignocaine and esmolol group as compared to labetalol. CONCLUSION: Haemodynamic alterations are usually observed during laryngoscopy and endotracheal intubation. In our study it was found that as labetalol is a safe and effective drug, for attenuation of sympathomimetic response.


2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Cristina Chimenti ◽  
Romina Verardo ◽  
Andrea Frustaci

Abstract Aim To investigate the contribution of unaffected cardiomyocytes in Fabry disease cardiomyopathy. Findings Left ventricular (LV) endomyocardial biopsies from twenty-four females (mean age 53 ± 11 ys) with Fabry disease cardiomyopathy were studied. Diagnosis of FD was based on the presence of pathogenic GLA mutation, Patients were divided in four groups according with LV maximal wall thickness (MWT): group 1 MWT ≤ 10.5 mm, group 2 MWT 10.5–15 mm, group 3 MWT 16–20 mm, group 4 MWT > 20 mm. At histology mosaic of affected and unaffected cardiomyocytes was documented. Unaffected myocytes’ size ranged from normal to severe hypertrophy. Hypertrophy of unaffected cardiomyocytes correlated with severity of MWT (p < 0.0001, Sperman r 0,95). Hypertrophy of unaffected myocytes appear to concur to progression and severity of FDCM. It is likely a paracrine role from neighboring affected myocytes.


Angiology ◽  
2021 ◽  
pp. 000331972199141
Author(s):  
Arafat Yildirim ◽  
Mehmet Kucukosmanoglu ◽  
Fethi Yavuz ◽  
Nermin Yildiz Koyunsever ◽  
Yusuf Cekici ◽  
...  

Many parameters included in the Anticoagulation and Risk Factors in Atrial Fibrillation (ATRIA) and CHA2DS2-VASc (congestive heart failure, hypertension, age ≥75 years, diabetes mellitus, stroke, vascular disease, age 65-74 years, sex category) scores also predict coronary artery disease (CAD). We modified the ATRIA score (ATRIA-HSV) by adding hyperlipidemia, smoking, and vascular disease and also male sex instead of female. We evaluated whether the CHA2DS2-VASc, CHA2DS2-VASc-HS, ATRIA, and ATRIA-HSV scores predict severe CAD. Consecutive patients with coronary angiography were prospectively included. A ≥50% stenosis in ≥1epicardial coronary artery (CA) was defined as severe CAD. Patient with normal CA (n = 210) were defined as group 1, with <50% CA stenosis (n = 178) as group 2, and with ≥50% stenosis (n = 297) as group 3. The mean ATRIA, ATRIA-HSV, CHA2DS2-VASc, and CHA2DS2VASc-HS scores increased from group 1 to group 3. A correlation was found between the Synergy between PCI with Taxus and Cardiac Surgery score and ATRIA ( r = 0.570), ATRIA-HSV ( r = 0.614), CHA2DS2-VASc ( r = 0.428), and CHA2DS2-VASc-HS ( r = 0.500) scores ( Ps < .005). Pairwise comparisons of receiver operating characteristics curves showed that ATRIA-HSV (>3 area under curve [AUC]: 0.874) and ATRIA (>3, AUC: 0.854) have a better performance than CHA2DS2-VASc (>1, AUC: 0.746) and CHA2DS2-VASc-HS (>2, AUC: 0.769). In conclusion, the ATRIA and ATRIA-HSV scores are simple and may be useful to predict severe CAD.


2020 ◽  
Vol 9 (4) ◽  
pp. 1043 ◽  
Author(s):  
Pei-Hsun Sung ◽  
Yi-Chen Li ◽  
Mel S. Lee ◽  
Hao-Yi Hsiao ◽  
Ming-Chun Ma ◽  
...  

This phase II randomized controlled trial tested whether intracoronary autologous CD34+ cell therapy could further improve left ventricular (LV) systolic function in patients with diffuse coronary artery disease (CAD) with relatively preserved LV ejection fraction (defined as LVEF >40%) unsuitable for coronary intervention. Between December 2013 and November 2017, 60 consecutive patients were randomly allocated into group 1 (CD34+ cells, 3.0 × 107/vessel/n = 30) and group 2 (optimal medical therapy; n = 30). All patients were followed for one year, and preclinical and clinical parameters were compared between two groups. Three-dimensional echocardiography demonstrated no significant difference in LVEF between groups 1 and 2 (54.9% vs. 51.0%, respectively, p = 0.295) at 12 months. However, compared with baseline, 12-month LVEF was significantly increased in group 1 (p < 0.001) but not in group 2 (p = 0.297). From baseline, there were gradual increases in LVEF in group 1 compared to those in group 2 at 1-month, 3-months, 6-months and 12 months (+1.6%, +2.2%, +2.9% and +4.6% in the group 1 vs. −1.6%, −1.5%, −1.4% and −0.9% in the group 2; all p < 0.05). Additionally, one-year angiogenesis (2.8 ± 0.9 vs. 1.3 ± 1.1), angina (0.4 ± 0.8 vs. 1.8 ± 0.9) and HF (0.7 ± 0.8 vs. 1.8 ± 0.6) scores were significantly improved in group 1 compared to those in group 2 (all p < 0.001). In conclusion, autologous CD34+ cell therapy gradually and effectively improved LV systolic function in patients with diffuse CAD and preserved LVEF who were non-candidates for coronary intervention (Trial registration: ISRCTN26002902 on the website of ISRCTN registry).


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