scholarly journals Contradictory Effect of Coronary Collateral Circulation on Regional Myocardial Perfusion That Assessed by Quantitative Myocardial Perfusion Scintigraphy

2021 ◽  
Vol 12 (3) ◽  
pp. 193-200
Author(s):  
Semra Ozdemir ◽  
Ahmet Barutcu ◽  
Ercan Aksit ◽  
Ali Duygu ◽  
Fulya Koc Ozturk
Keyword(s):  
Myocardial Perfusion ◽  
Collateral Circulation ◽  
Myocardial Perfusion Scintigraphy ◽  
Perfusion Scintigraphy ◽  
Coronary Collateral Circulation ◽  
Regional Myocardial Perfusion ◽  
Coronary Collateral ◽  
Quantitative Myocardial Perfusion

Myocardial perfusion scintigraphy in Germany

2007 ◽  
Vol 46 (02) ◽  
pp. 49-55 ◽  
Author(s):  
W. Burchert ◽  
F. M. Bengel ◽  
R. Zimmermann ◽  
J. vom Dahl ◽  
W. Schäfer ◽  
...  
Keyword(s):  
Nuclear Medicine ◽  
Myocardial Perfusion ◽  
Attenuation Correction ◽  
Working Group ◽  
Primary Care Physicians ◽  
Gated Spect ◽  
Myocardial Perfusion Scintigraphy ◽  
German Society ◽  
University Hospitals ◽  
Perfusion Scintigraphy

SummaryThe working group Cardiovascular Nuclear Medicine of the German Society of Nuclear Medicine (DGN), in cooperation with the working group Nuclear Cardiology of the German Cardiac Society (DGK), decided to conduct a national survey on myocardial perfusion scintigraphy (MPS). Method: A questionnaire to evaluate MPS for the year 2005 was sent. Results: 346 completed questionnaires had been returned (213 private practices, 99 hospitals and 33 university hospitals). MPS of 112 707 patients were reported with 110 747 stress and 95 878 rest studies. The majority (>75%) was performed with 99mTc-MIBI or tetrofosmin. 201Tl stress-redistribution was used in 22 637 patients (20%). The types of stress were exercise in 78%, vasodilation with adenosine or dipyridamol in 21% and dobutamine in 1%. 99.97% of all MPS were SPECT studies. Gated SPECT was performed in 36% of the stress and in 32% of the rest studies. An attenuation correction was used in 21%. 29 institutions (8%) performed gated SPECT (stress and rest) and attenuation correction. 47% of all MPS were requested by ambulatory care cardiologists, 17% by internists, 12% by primary care physicians, 21% by hospital departments and 2% by others. Conclusion: In Germany, MPS is predominantly performed with 99mTc-perfusion agents. The common type of stress is ergometry. Gated SPECT and attenuation correction do not yet represent standards of MPS practice in Germany, which indicates some potential of optimization.

Paradoxical Hypotension during Dobutamine Infusion for Myocardial Perfusion Scintigraphy

1998 ◽  
Vol 37 (08) ◽  
pp. 268-271
Author(s):  
B. Caner ◽  
E. Atalar ◽  
A. Karanfil ◽  
L. Tokgözoğlu ◽  
E. L. Ergün
Keyword(s):  
Blood Pressure ◽  
Myocardial Perfusion ◽  
Systolic Blood Pressure ◽  
Myocardial Perfusion Scintigraphy ◽  
Stress Test ◽  
Dobutamine Infusion ◽  
Perfusion Scintigraphy ◽  
Tilt Table ◽  
Study Results ◽  
Group A

Summary Aim: Dobutamine as a predominant beta-1 agonist increases heart rate and myocardial contractility and at sufficient high doses, it also increases systolic blood pressure. This study was undertaken to describe instances of paradoxical hypotension during dobutamine infusion for TI-201 myocardial perfusion SPECT study and the relationship between scintigraphic findings and hypotension occurred during dobutamine infusion. Methods: In 201 consecutive patients unable to perform adequate exercise, dobutamine TI-201 myocardial SPECT was performed. Dobutamine was infused starting from 10 μg/kg/min increasing to 40 μg/kg/min. Paradoxical hypotension was defined as a decrease in systolic blood pressure ≥ 20 mmHg compared with baseline study. Results: Paradoxical hypotension was observed in 40 patients (Group A) out of 201 (19.9%) while no significant change in systolic blood pressure was detected in the remaining 161 patients (Group B). Mean maximum fall in systolic blood pressure was 39 ± 18 mmHg (range: 20-90). In 33 of 40 patients (83%) with paradoxical hypotension, scintigraphy was normal compared to 131 (81%) of the remaining 161 patients. In patients of Group A, angiography, echocardiography and tilt table tests were performed in 13, 11 and 6 patients respectively. Nine of 13 angiographic evaluations (69%), 10 of 11 echocardiographic evaluations (91%), all of the tilt table tests were normal. Additionally, all of the patients of Group A were clinically followed up at least 6 months after the myocardial perfusion scintigraphy. None of the patients had a cardiac event except one patient during the follow-up period. Conclusion: Paradoxical hypotension during dobutamine infusion for myocardial scintigraphy is not an uncommon finding and up to 19.9% patients may develop such hypotension. To maximize test safety, precautions should be taken during dobutamine myocardial stress test, since remarkable decrease in systolic blood pressure may occur. Unlike hypotension occurring with exercise test, hypotension response to dobutamine is not always a marker for coronary artery disease.

Myocardial Perfusion Scintigraphy

2007 ◽  
Author(s):  
Bob Bury ◽  
Catherine Dickinson ◽  
Karen Sheard ◽  
Penny Thorley
Keyword(s):  
Myocardial Perfusion ◽  
Myocardial Perfusion Scintigraphy ◽  
Perfusion Scintigraphy

A MODELLING ANALYSIS OF THALLIUM-201 MYOCARDIAL PERFUSION SCINTIGRAPHY

1991 ◽  
Vol 26 (12) ◽  
pp. 1144
Author(s):  
P. Tito Nguven ◽  
James Caplan ◽  
William Ashburn ◽  
Wes Dillon
Keyword(s):  
Myocardial Perfusion ◽  
Myocardial Perfusion Scintigraphy ◽  
Thallium 201 ◽  
Perfusion Scintigraphy ◽  
Modelling Analysis

scholarly journals Prognostic value of myocardial perfusion scintigraphy in asymptomatic patients with diabetes mellitus at high cardiovascular risk: 5-year follow-up of the prospective multicenter BARDOT trial

2021 ◽  
Author(s):  
Federico Caobelli ◽  
◽  
Philip Haaf ◽  
Gianluca Haenny ◽  
Matthias Pfisterer ◽  
...  
Keyword(s):  
Cardiovascular Risk ◽  
Myocardial Perfusion ◽  
Cardiovascular Events ◽  
Prognostic Value ◽  
Myocardial Perfusion Scintigraphy ◽  
Major Adverse Cardiovascular Events ◽  
Diabetic Patients ◽  
Perfusion Scintigraphy ◽  
High Cardiovascular Risk

Abstract Background The Basel Asymptomatic High-Risk Diabetics’ Outcome Trial (BARDOT) demonstrated that asymptomatic diabetic patients with an abnormal myocardial perfusion scintigraphy (MPS) were at increased risk of major adverse cardiovascular events (MACEs) at 2-year follow-up. It remains unclear whether this finding holds true even for a longer follow-up. Methods Four hundred patients with type 2 diabetes, neither history nor symptoms of coronary artery disease (CAD), were evaluated clinically and with MPS. Patients were followed up for 5 years. Major adverse cardiovascular events (MACEs) were defined as all-cause death, myocardial infarction, or late coronary revascularization. Results At baseline, an abnormal MPS (SSS ≥ 4 or SDS ≥ 2) was found in 87 of 400 patients (22%). MACE within 5 years occurred in 14 patients with abnormal MPS (16.1%) and in 22 with normal scan (1.7%), p = 0.009; 15 deaths were recorded. Patients with completely normal MPS (SSS and SDS = 0) had lower rates of MACEs than patients with abnormal scans (2.5% vs. 7.0%, p = 0.032). Patients with abnormal MPS who had undergone revascularization had a lower mortality rate and a better event-free survival from MI and revascularization than patients with abnormal MPS who had either undergone medical therapy only or could not be revascularized (p = 0.002). Conclusions MPS may have prognostic value in asymptomatic diabetic patients at high cardiovascular risk over a follow-up period of 5 years. Patients with completely normal MPS have a low event rate and may not need retesting within 5 years. Patients with an abnormal MPS have higher event rates and may benefit from a combined medical and revascularization approach.

scholarly journals Preoperative Cardiac Diagnostics in Bariatric Patients with Diabetes and Perioperative Morbidity: Results of a Cohort of 258 Patients

2021 ◽  
Author(s):  
Benjamin Stillhard ◽  
B. T. Truc Ngo ◽  
Ralph Peterli ◽  
Thomas Peters ◽  
Romano Schneider ◽  
...  
Keyword(s):  
Bariatric Surgery ◽  
Myocardial Perfusion ◽  
Cardiac Catheterization ◽  
Myocardial Perfusion Scintigraphy ◽  
Perfusion Scintigraphy ◽  
Perioperative Morbidity ◽  
Obesity And Diabetes ◽  
Patients With Diabetes ◽  
Cardiac Assessment ◽  
Bariatric Patients

Abstract Purpose The combination of obesity and diabetes mellitus are well-known risk factors for cardiovascular complications and perioperative morbidity in metabolic surgery. The aim of this study was to evaluate effectivity and reliability of the cardiac assessment in patients with diabetes prior to bariatric surgery. Setting Private, university-affiliated teaching hospital, Switzerland Material and Methods Retrospective analysis of prospectively collected data on results and consequences of cardiac assessments in 258 patients with obesity and diabetes scheduled for primary bariatric surgery at our institution between January 2010 and December 2018. Results Out of 258 patients, 246 (95.3%) received cardiac diagnostics: 173 (67.1%) underwent stress-rest myocardial perfusion scintigraphy (MPS), 15 (5.8%) patients had other cardiac imaging including cardiac catheterization, 58 (22.5%) patients had echocardiography and/or stress electrocardiography, and 12 (4.7%) patients received no cardiac evaluation. Subsequently, cardiac catheterization was performed in 28 patients (10.9%), and coronary heart disease was detected and treated in 15 subjects (5.8%). Of these 15 individuals, 5 (33.3%) patients had diffuse vascular sclerosis, 8 (53.3%) patients underwent coronary angioplasty and stenting, and 2 (13.3%) patients coronary artery bypass surgery. Bariatric surgery was performed without perioperative cardiovascular events in all 258 patients. Conclusion Our data suggest that a detailed cardiac assessment is mandatory in bariatric patients with diabetes to identify those with yet unknown cardiovascular disease before performing bariatric surgery. We recommend carrying out myocardial perfusion scintigraphy as a reliable diagnostic tool in this vulnerable population. If not viable, stress echocardiography should be performed as a minimum.

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