scholarly journals Prognostic value of non-invasive coronary artery flow velocity assessment in elderly patients

2021 ◽  
Vol 22 (Supplement_1) ◽  
Author(s):  
E Kalinina ◽  
A Zagatina ◽  
N Zhuravskaya ◽  
D Shmatov
Keyword(s):  
Myocardial Infarction ◽  
Coronary Artery ◽  
Elderly Patients ◽  
Flow Velocity ◽  
Coronary Arteries ◽  
Coronary Flow ◽  
Prognostic Value ◽  
Area Under Curve ◽  
Left Coronary Artery ◽  
Maximal Velocity

Abstract Funding Acknowledgements Type of funding sources: None. Background There is a high prevalence of coronary artery disease (CAD) in the elderly population. However, symptoms of CAD are often non-specific. Dyspnoe, non-anginal pains are among the main symptoms in older patients. Exercise tests are of limited feasibility in these patients, due to neuro-muscular weakness, physical deconditioning, and orthopaedic limitations. Pharmacological tests often are contraindicated in a substantial percentage of elderly patients. Some recent studies indicate using local flow acceleration during routine echocardiography has prognostic potential for coronary artery assessments without stress testing. The aim of the study was to define the prognostic value of coronary artery ultrasound assessment in patients ≥75 years old. Methods This is a prospective cohort study. Patients ≥ 75 years old who underwent routine echocardiography with additional scans for coronary arteries over a period of 24 months were included in the study. The study group consisted of 80 patients aged 75-90 years (56 women; mean age 79 ± 4). Initial exams were performed for other reasons, primarily for arterial hypertension. Fifteen patients had known CAD. Death, non-fatal myocardial infarction (MI), and revascularization were defined as major adverse cardiac events (MACE). All patients were followed up with at a median of 32 months. Results There were 34 patients with high local velocities in the left coronary artery. Eight deaths, two non-fatal myocardial infarctions occurred, and 13 revascularizations were performed. With a ROC analysis, a coronary flow velocity >110 cm/s was the best predictor for risk of death (area under curve 0.84 [95% CI 0.74–0.92]; sensitivity 75%; specificity 88%). Only the maximal velocity in proximal left-sided coronary arteries was independently associated with death (HR 1.03, 95% CI 1.01; 1.05; p < 0.002), or death/MI (HR 1.03, 95% CI 1.01; 1.04; p < 0.0001). The cut-off value of 66 cm/s was a predictor of all MACE (area under curve 0.87 [95% CI 0.77–0.94]; sensitivity 80%; specificity 86%). Any causes of death or MI occurred more frequently in patients with velocities of >66 cm/s (27% vs. 2%; p < 0.002). The rates of MACE were 58.0% vs. 2%; p < 0.0000001, respectively. Conclusion The analysis of coronary flow in the left coronary artery during echocardiography can be used as a predictor of outcomes in elderly patients. Maximal velocities in proximal left-sided coronary arteries is independently associated with further death or myocardial infarction.

P1469Comparison prognostic values of coronary flow velocity assessment and ejection fraction during routine echocardiography

2019 ◽  
Vol 40 (Supplement_1) ◽  
Author(s):  
A Zagatina ◽  
N Zhuravskaya ◽  
O Guseva ◽  
E Kalinina ◽  
D Shmatov
Keyword(s):  
Myocardial Infarction ◽  
Coronary Artery ◽  
Ejection Fraction ◽  
Coronary Arteries ◽  
Acute Coronary Syndromes ◽  
Coronary Flow ◽  
Maximal Velocity ◽  
Coronary Flow Velocity ◽  
Coronary Syndromes

Abstract Background Ejection fraction (EF) is a parameter that has traditionally been used for prognostic aims during echocardiography. However, it is known that its prognostic role is accurate only if EF has clearly decreased. So, in the large group of patients who had no prior myocardial infarction, with normal EF but with severe narrowing of main coronary arteries, it is impossible to predict a high risk of adverse coronary events in the near future with transthoracic echocardiography at rest. The aim of the study was to compare prognostic values of coronary flow velocity assessment and EF during transthoracic echocardiography. Methods A prospective cohort study comprises 747 patients (380 males; age 58+13 years) referred for echocardiography. Left side coronary artery (left main - LM, left descending – LAD, and circumflex arteries -LCx) flows were scanned in addition to conventional echocardiography. Cardiac death, nonfatal myocardial infarction (MI), acute coronary syndrome and revascularization were defined as major adverse cardiac events (MACE). The period of follow-up was 3 years. Results During a median follow-up of 36 months, 192 patients experienced 224 MACE. Twenty-six deaths, 16 non-fatal MI, 2 acute coronary syndromes, 180 revascularizations were observed. EF and maximal velocity in proximal segments of coronary arteries were independents predictors of death/MI/acute coronary syndromes. The maximal velocity had a significantly higher predictive value (p<0.004) in the whole group (Figure 1A) as well as among the patients with near normal/normal EF (Figure 1B, 1C). The maximal velocity had a significantly higher predictive value (p<0.0001) of MACE (Figure 1D). Conclusion Coronary artery scan assessment had the statistically significantly higher predictive accuracy of MACE in comparison with traditional EF in the whole group and in the subgroups with different degrees of decreasing EF.

scholarly journals 1174 Coronary flow velocity assessment in routine echocardiography predicts adverse outcomes in three-year period in different subgroups

2020 ◽  
Vol 21 (Supplement_1) ◽  
Author(s):  
A Zagatina ◽  
N Zhuravskaya ◽  
O Guseva ◽  
E Kalinina ◽  
Y Drozdova ◽  
...  
Keyword(s):  
Arterial Hypertension ◽  
Flow Velocity ◽  
Coronary Arteries ◽  
Coronary Flow ◽  
Prognostic Value ◽  
Area Under Curve ◽  
Valve Disease ◽  
Left Main ◽  
Coronary Flow Velocity ◽  
Coronary Syndrome

Abstract Background The previous diagnostic study had demonstrated high correlation of maximal coronary flow velocity with significant stenoses by invasive methods. There is a lack of information about the prognostic value of local high velocity in coronary arteries during echocardiography. The present study was aimed at investigating the three-year prognostic value of coronary flow assessment in all patients were referred for routine echocardiography examination in different subgroup. Methods The prospective study comprises 747 consecutive patients (380 males; age 58 + 13 years) referred to echocardiography. Routine echocardiography was added with coronary flow velocity assessment in the left main (LM), left anterior descending (LAD) or circumflex (Cx) coronary arteries measured by Doppler method. Death, nonfatal myocardial infarction (MI), acute coronary syndrome (ACS) and/or revascularization were defined as major adverse cardiac events (MACE). Results During a median follow-up of 36 months, 192 patients experienced 224 MACE. Twenty-six deaths, 16 non-fatal MI, 2 ACS, 180 revascularizations were observed. The value of 67 cm/s maximal coronary flow velocity in the left main/proximal LAD/proximal LCX arteries was the best predictor for death (area under curve 0.79, 95% CI 0.76-0.82), p &lt; 0.0001, and 66 cm/s was the best predictor for death/MI (area under curve 0.81, 95% CI 0.78-0.84), p &lt; 0.0001. A value of 64 cm/s in left main/proximal LAD/proximal LCX arteries was a significant predictor of all MACE (area under curve 0.83, 95% CI 0.79-0.85), sensitivity 73%, specificity 84%, p &lt; 0.0001. Death/MI/ACS syndrome were observed in the main group in 17% vs. 1% patients with coronary velocity more than 65 cm/s the left main/proximal LAD/proximal LCX arteries vs. patients with less than 65 cm/s, respectively, p &lt; 0.0001. Arterial hypertension subgroup. Deaths occurred in 9% vs. 1%, p &lt; 0.003. Death/MI/ACS were observed in 11% vs. 1%, p &lt; 0.004. Subgroup with known CAD. Deaths occurred in 11% vs. 3%, p &lt; 0.04. Death/MI/ACS were observed in 20% vs. 3%, p &lt; 0.0006. Subgroup of patient with unknown origin chest pain. Deaths occurred in 3% vs. 1%, p – non significant. Death/MI/ACS observed in 9% vs. 0, p &lt; 0.04. Subgroup with valve disease. Deaths occurred in 17% vs. 0%, p &lt; 0.02. Death/MI/ACS were observed in 17% vs. 0%, p &lt; 0.02. Conclusion The coronary velocity parameters give long-term prognostic information that can be used to identify persons with a high risk of MACE in non-selected patients, also as in patients with arterial hypertension, known or suspected CAD, valve disease. Abstract 1174 Figure.

Intraoperative transesophageal assessment of coronary artery flow can predict 5 type myocardial infarction

2020 ◽  
Vol 41 (Supplement_2) ◽  
Author(s):  
A Zagatina ◽  
M Novikov ◽  
N Zhuravskaya ◽  
V Balakhonov ◽  
S Efremov ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Cardiac Surgery ◽  
Coronary Artery ◽  
Flow Velocity ◽  
Coronary Flow ◽  
Index Number ◽  
Left Main ◽  
Coronary Flow Velocity ◽  
Before And After ◽  
Flow Velocities

Abstract Background Stenosis of a coronary artery results in an increase in flow velocity in the pathologic segment. Effective grafting should decrease the stenotic native coronary velocity according to hemodynamic law. The range of decreased velocity before and after cardiac surgery can hypothetically reflect the effectiveness of a graft. The aim of the study is to determine if measuring coronary flow velocity changes during coronary artery bypass grafting (CABG) can predict intraoperative myocardial infarction. Methods One hundred sixty-six (166) consecutive patients (121 men, 64±9 years old) referred for cardiac surgery, were prospectively included in the study. A standard basic perioperative transesophageal echocardiography (TEE) examination was performed with additional scans of the left main, left anterior descending (LAD), and circumflex (LCx) arteries' proximal segments. Measurements of coronary flow velocities were performed before and after grafting in the same sites of the arteries. The maximal value of cardiac troponin I (cTnI) after CABG and the additive criteria were accounted for in the analysis as it is described in the expert consensus document for Type 5 myocardial infarction (MI) definition. Results One hundred sixty-three patients (98%) had arterial hypertension, 28 patients (17%) had diabetes mellitus, 35 patients (21%) were currently smokers. The feasibility of coronary flow assessment during cardiac operations was 95%. Before grafting, the mean velocity in the left main artery was 91±49 cm/s, in LAD 101±35 cm/s, and in LCx 117±49 cm/s. There was a significant correlation between changes in coronary flow velocities during operation and the value of cTnI (R=0.34, p&lt;0.0001). Ten patients met the criteria for Type 5 MI. There were no differences in age, body mass index, number of coronary arteries with stenoses, frequency of prior MI, ejection fraction or coronary flow velocity before surgery in patients with and without Type 5 MI. The group of patients with Type 5 MI had an increase in native artery velocities during surgery in comparison with patients without MI, who had a significant decrease in coronary flow velocity after grafting (30±48 vs. −10±30 cm/s; p&lt;0.0006). Increases in native coronary velocities greater than 3 cm/s predicted Type 5 MI with 81% accuracy (sensitivity 88%, specificity 70%). Conclusion Coronary flow velocity assessment during cardiac surgery could predict an elevation of cardiac troponins and Type 5 MI. Funding Acknowledgement Type of funding source: None

Impact on Diabetes Mellitus on the Epicardial Coronary Flow Velocity Assessed by the Thrombolysis in Myocardial Infarction Frame Count

Angiology ◽  
2008 ◽  
Vol 60 (4) ◽  
pp. 431-440 ◽  
Author(s):  
Ahmet Soylu ◽  
Kurtulus Ozdemir ◽  
Mehmet Akif Duzenli ◽  
Mehmet Yazici ◽  
Mehmet Tokac
Keyword(s):  
Diabetes Mellitus ◽  
Myocardial Infarction ◽  
Type 2 Diabetes ◽  
Type 2 Diabetes Mellitus ◽  
Flow Velocity ◽  
Coronary Arteries ◽  
Coronary Flow ◽  
Coronary Flow Velocity ◽  
And Gender

The aim of this study is to evaluate the effect of type 2 diabetes mellitus on epicardial coronary flow velocity assessed by the thrombolysis in myocardial infarction frame count. The thrombolysis in myocardial infarction frame count was measured in 272 coronary arteries from 101 patients with type 2 diabetes mellitus and in 271 coronary arteries from 104 age- and gender-matched patients without type 2 diabetes mellitus referred for coronary angiography. The thrombolysis in myocardial infarction frame count was measured only in normal arteries or in arteries without significant lesion. By both univariate and multivariate analysis, the thrombolysis in myocardial infarction frame count was not related with either type 2 diabetes mellitus or the duration and glycated hemoglobin levels in the patients with type 2 diabetes mellitus. The thrombolysis in myocardial infarction frame count was significantly associated with body surface area, heart rate, and proximal coronary artery diameter. Type 2 diabetes mellitus did not affect epicardial coronary flow velocity assessed by the thrombolysis in myocardial infarction frame count.

scholarly journals Among Ectasia Patients with Coexisting Coronary Artery Disease, TIMI Frame Count Correlates with Ectasia Size and Markis Type IV Is the Commonest

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Hasahya Tony ◽  
Kai Meng ◽  
Bangwei Wu ◽  
Qiutang Zeng
Keyword(s):  
Coronary Artery Disease ◽  
Coronary Artery ◽  
Coronary Angiography ◽  
Flow Velocity ◽  
Coronary Arteries ◽  
Coronary Flow ◽  
Coronary Artery Ectasia ◽  
Timi Frame Count ◽  
Type Iv ◽  
Artery Disease

Background. Coronary artery ectasia (CAE) occurs in 0.3 to 5.3% of patients undergoing coronary angiography. TIMI frame count (TFC) is an index of coronary flow that correlates with flow velocity. In ectasia patients, there is delayed coronary flow with increased TFC.Methods.We evaluated angiograms of 789 patients for presence of CAE, coronary artery disease (CAD), and Markis type of CAE. We measured ectasia size and length and their correlation with TFC in ectatic right coronary arteries (RCA) of patients with CAE and CAD.Results.30 patients had CAE (3.8%). Of these 16.7% had isolated CAE, while 83.87% had CAE and CAD. Among CAE and CAD patients, the RCA was most involved (70.4%), and Markis type IV CAE was the commonest (64%). In isolated CAE, the RCA, LAD, and LCx were equally involved (33.3%). Patients with CAE and CAD had significantly higher TFC compared to controls,P=0.035. There was a positive correlation of moderate strength, between ectasia size and TFC,r(17) = 0.598,P=0.007. Ectasia length was not significantly correlated with TFC, rho (17) = 0.334,P=0.163.Conclusion.Among patients undergoing angiography, CAE has a prevalence of 3.8% and Markis type IV is the commonest. Larger ectasias are associated with slower coronary flow.

scholarly journals Differences in cardiac microcirculatory wave patterns between the proximal left mainstem and proximal right coronary artery

2008 ◽  
Vol 295 (3) ◽  
pp. H1198-H1205 ◽  
Author(s):  
Nearchos Hadjiloizou ◽  
Justin E. Davies ◽  
Iqbal S. Malik ◽  
Jazmin Aguado-Sierra ◽  
Keith Willson ◽  
...  
Keyword(s):  
Coronary Artery ◽  
Flow Velocity ◽  
Coronary Arteries ◽  
Right Coronary Artery ◽  
Coronary Flow ◽  
Wave Intensity ◽  
Intensity Analysis ◽  
Wave Intensity Analysis ◽  
Coronary Flow Velocity ◽  
Proximal Right Coronary Artery

Despite having almost identical origins and similar perfusion pressures, the flow-velocity waveforms in the left and right coronary arteries are strikingly different. We hypothesized that pressure differences originating from the distal (microcirculatory) bed would account for the differences in the flow-velocity waveform. We used wave intensity analysis to separate and quantify proximal- and distal-originating pressures to study the differences in velocity waveforms. In 20 subjects with unobstructed coronary arteries, sensor-tipped intra-arterial wires were used to measure simultaneous pressure and Doppler velocity in the proximal left main stem (LMS) and proximal right coronary artery (RCA). Proximal- and distal-originating waves were separated using wave intensity analysis, and differences in waves were examined in relation to structural and anatomic differences between the two arteries. Diastolic flow velocity was lower in the RCA than in the LMS (35.1 ± 21.4 vs. 56.4 ± 32.5 cm/s, P < 0.002), and, consequently, the diastolic-to-systolic ratio of peak flow velocity in the RCA was significantly less than in the LMS (1.00 ± 0.32 vs. 1.79 ± 0.48, P < 0.001). This was due to a lower distal-originating suction wave (8.2 ± 6.6 × 103 vs. 16.0 ± 12.2 × 103 W·m−2·s−1, P < 0.01). The suction wave in the LMS correlated positively with left ventricular pressure ( r = 0.6, P < 0.01) and in the RCA with estimated right ventricular systolic pressure ( r = 0.7, P = 0.05) but not with the respective diameter in these arteries. In contrast to the LMS, where coronary flow velocity was predominantly diastolic, in the proximal RCA coronary flow velocity was similar in systole and diastole. This difference was due to a smaller distal-originating suction wave in the RCA, which can be explained by differences in elastance and pressure generated between right and left ventricles.

scholarly journals P1293 Coronary artery flow velocity alteration by transthoracic echo in a group of young adult males

2020 ◽  
Vol 21 (Supplement_1) ◽  
Author(s):  
O Sukhanova ◽  
A Zagatina ◽  
N Zhuravskaya ◽  
A V Ivanov ◽  
D Shmatov
Keyword(s):  
Cardiovascular Disease ◽  
Coronary Artery ◽  
High Risk ◽  
Ejection Fraction ◽  
Flow Velocity ◽  
Coronary Flow ◽  
Maximal Velocity ◽  
Myocardial Mass ◽  
Coronary Flow Velocity ◽  
Apparently Healthy

Abstract Funding Acknowledgements university Grand Background Atherosclerosis is a chronic and progressive disease that causes high mortality primarily in persons over the age of forty. However, a lot of atherosclerosis cases are only discovered after a fatal cardiovascular event. Several techniques can be used to identify atherosclerosis when it is still in its subclinical stages and at ages before the symptoms of atherosclerosis became marked. The SCORE chart and other scores were developed for this purpose. However, the SCORE chart doesn’t cover the people under 40 years old. A significant portion of patients with a high risk of cardiovascular disease have major cardiac events before reaching 40 years of age. The aim of the study was to define subclinical coronary flow alteration in apparently healthy men between the ages of 30-39. Methods This is part of a study intended to facilitate risk estimation in apparently healthy persons between 30 and 39 years old with no documented cardiovascular disease. Seventy-two consecutive men (34 ± 3 years old) who were assumed healthy, were recruited into the study. A standard cardiology exam; analysis of blood lipids; basic transthoracic echocardiography examination with additional scans of the left main, left anterior descending, and circumflex arteries; and carotid ultrasound were performed. Results Among the study population there were eight obese patients (12.5%), twenty-two (22%) smokers, forty-eight (66%) had dyslipidaemias, and six (8%) had a first-degree relative with known premature coronary or vascular events. All of them had a normal ejection fraction (65 ± 4%) and heart chamber sizes. The mean global longitudinal strain (GLS) was -19.3 ± 2%, myocardial mass index was 77 ± 12 g/m2, and intima-media thickness (IMT) was 0.74 ± 0.19 mm. Intima-media thickening at standard site was found in twelve patients (17%, 95% CI 9-26%), atherosclerosis with pronounced plaques in carotid arteries was diagnosed in twenty-one man (29%, 95% CI 19-40%). The group with atherosclerotic plaques had a higher maximal velocity in coronary arteries (44 ± 16 vs. 33 ± 11 cm/s, p &lt; 0.002) compared to other patients. Ejection fraction (65 ± 5 vs. 65 ± 4 %, p = 0.93), myocardial mass index (81 ± 13 vs. 75 ± 12, g/m2 p = 0.053), and GLS (-19 ± 3 vs. -19 ± 2 %, p = 0.55) were similar. There was a significant correlation between IMT and maximal velocity in coronary arteries (r=-0.44, p &lt; 0.0005). Three patients of atherosclerotic group (14%, 95% CI 3-32%) had coronary flow velocity more than 68 cm/s corresponding significant coronary artery lesions. Conclusion There is a high prevalence of subclinical atherosclerosis among men between the ages of 30 and 39 in a population with a high risk of cardiovascular disease by SCORE chart. Coronary flow velocity assessment could be helpful for detection of coronary lesions in young adult patients with carotid plaques.

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