scholarly journals Surviving a stressful MIBI scan

CJEM ◽  
2013 ◽  
Vol 15 (06) ◽  
pp. 392-396 ◽  
Author(s):  
Robert Gooch ◽  
Lisa Bryski ◽  
Ewa Courvoisier-Grzywacz
Keyword(s):  
Coronary Artery Disease ◽  
Stress Testing ◽  
Stress Test ◽  
Pharmacologic Stress ◽  
Test Laboratory ◽  
Cardiac Monitoring ◽  
Emergency Physicians ◽  
Hemodynamic Stability ◽  
Cardiac Stress ◽  
Artery Disease

ABSTRACTDipyridamole/technetium sestamibi scans (more commonly known as MIBI scans, an acronym for methoxyisobutyl isonitrile) are used commonly for the diagnosis and risk stratification of coronary artery disease. Adverse events from MIBI scans are extremely rare. We present the case of a 64-year-old man who was successfully resuscitated after two asystolic episodes following dipyridamole infusion for a MIBI scan. The second asystolic episode occurred in the emergency department 40 minutes after the patient had been transferred from the Cardiac Stress Test Laboratory. To our knowledge, there are no previous reports of patients having two discrete asystolic episodes or an asystolic episode as delayed as we report after a MIBI scan. Our case illustrates why emergency physicians should be aware of the potential for asystole following MIBI scanning and why aminophylline, the antidote for dipyridamole, should be readily available in emergency departments that could see patients after pharmacologic stress testing. Patients who become asystolic following dipyridamole infusion likely require prolonged cardiac monitoring, given the potential for further episodes after periods of hemodynamic stability.

Abstract 251: Clinical Symptoms and Angiographic Findings of Patients Undergoing Percutaneous Coronary Intervention without Prior Stress Testing: Insights from the NCDR

2012 ◽  
Vol 5 (suppl_1) ◽  
Author(s):  
Mouin Abdallah ◽  
John Spertus ◽  
Nestor Mercado ◽  
Brahmajee Nallamothu ◽  
Kevin Kennedy ◽  
...  
Keyword(s):  
Coronary Artery Disease ◽  
Coronary Artery ◽  
Stress Testing ◽  
Diagnostic Yield ◽  
Stress Test ◽  
Test Group ◽  
Coronary Intervention ◽  
Percutaneous Coronary ◽  
Artery Disease ◽  
Prior Stress

Background: Many patients undergoing elective percutaneous coronary intervention (PCI) do not have prior stress testing. It is unknown if these patients have more severe angina or obstructive coronary artery disease (CAD), whereby proceeding directly to PCI would represent sound clinical judgment and efficient use of resources. Methods: We identified elective PCIs performed between 1/1/09 - 3/31/11 in the NCDR CathPCI Registry ® and assessed for differences in angina (CCS class) and severity of CAD in those with and without pre-procedural stress testing. To further understand whether proceeding to PCI without prior stress testing could be justified because of a high pre-test probability for obstructive CAD (e.g., >70% stenosis in an epicardial coronary artery), we evaluated cardiac catheterizations performed within the registry during the same period to assess the diagnostic yield of obstructive CAD in patients with and without prior stress testing. Results: Of 246,629 elective PCIs, 89,084 (36.1%) were performed without prior stress testing. A substantial proportion of both groups undergoing PCI were asymptomatic (no stress test group: 28.9% vs. stress test group: 30.7%), with only a modest difference in the frequency of CCS class III/IV angina (16.2% vs. 11.9%; Table). No meaningful differences in the frequency of proximal LAD (29.7 % vs. 29.9%), left main (5.6% vs. 7.2%) or 3-vessel coronary artery disease (21.1% vs. 19.5%) were observed in the 2 PCI groups. Moreover, the diagnostic yield for obstructive CAD on cardiac catheterization for patients without prior stress testing (n=462,611) was 35.4%, as compared with 58.0%, 38.8%, and 24.1% for those with severe, moderate, and mild ischemia, on pre-procedural stress testing. Conclusion: For elective PCI, the current practice of proceeding to coronary angiography and PCI without prior stress testing does not identify higher risk coronary anatomy or more symptomatic patients and may not improve diagnostic yield.

scholarly journals Relationship of Stress Test Findings to Anatomic or Functional Extent of Coronary Artery Disease Assessed by Coronary Computed Tomography Angiography-Derived Fractional Flow Reserve

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Demetrios Doukas ◽  
Sorcha Allen ◽  
Amy Wozniak ◽  
Siri Kunchakarra ◽  
Rina Verma ◽  
...  
Keyword(s):  
Coronary Artery Disease ◽  
Chest Pain ◽  
Coronary Artery ◽  
Stress Testing ◽  
Stress Test ◽  
Exercise Duration ◽  
Fractional Flow ◽  
Coronary Cta ◽  
Flow Reserve ◽  
Artery Disease

Background. In the United States, functional stress testing is the primary imaging modality for patients with stable symptoms suspected to represent coronary artery disease (CAD). Coronary computed tomography angiography (CTA) is excellent at identifying anatomic coronary artery disease (CAD). The application of computational fluid dynamics to coronary CTA allows fractional flow reserve (FFR) to be calculated noninvasively (FFRCT). The relationship of noninvasive stress testing to coronary CTA and FFRCT in real-world clinical practice has not been studied. Methods. We evaluated 206 consecutive patients at Loyola University Chicago with suspected CAD who underwent noninvasive stress testing followed by coronary CTA and FFRCT when indicated. Patients were categorized by stress test results (positive, negative, indeterminate, and equivocal). Duke treadmill score (DTS), METS, exercise duration, and chest pain with exercise were analyzed. Lesions ≥ 50 % stenosis were considered positive by coronary CTA. FF R CT < 0.80 was considered diagnostic of ischemia. Results. Two hundred and six patients had paired noninvasive stress test and coronary CTA/FFRCT results. The median time from stress test to coronary CTA was 49 days. Average patient age was 60.3 years, and 42% were male. Of the 206 stress tests, 75% were exercise (70% echocardiographic, 26% nuclear, and 4% EKG). There were no associations of stress test results with CAD > 50 % or FF R CT < 0.80 ( p = 0.927 and p = 0.910 , respectively). Of those with a positive stress test, only 30% (3/10) had CAD > 50 % and only 50% (5/10) had FF R CT < 0.80 . Chest pain with exercise did not correlate with CAD > 50 % or FF R CT < 0.80 ( p = 0.66 and p = 0.12 , respectively). There were no significant correlations between METS, DTS, or exercise duration and FFRCT ( r = 0.093 , p = 0.274 ; r = 0.012 , p = 0.883 ; and r = 0.034 , p = 0.680 ; respectively). Conclusion. Noninvasive stress testing, functional capacity, chest pain with exercise, and DTS are not associated with anatomic or functional CAD using a diagnostic strategy of coronary CTA and FFRCT.

scholarly journals Simple exercise test score versus cardiac stress test for the prediction of coronary artery disease in patients with type 2 diabetes

2014 ◽  
Vol 124 (4) ◽  
pp. 157-164
Author(s):  
Witold Pikto‑Pietkiewicz ◽  
Monika Przewłocka ◽  
Barbara Chybowska ◽  
Alona Cyciwa ◽  
Tomasz Pasierski
Keyword(s):  
Type 2 Diabetes ◽  
Coronary Artery Disease ◽  
Coronary Artery ◽  
Exercise Test ◽  
Test Score ◽  
Stress Test ◽  
Cardiac Stress ◽  
Artery Disease ◽  
Cardiac Stress Test

Abstract 1205: Patients without obstructive coronary artery disease and stress test results: An analysis from the National Cardiovascular Data Registry

Circulation ◽  
2008 ◽  
Vol 118 (suppl_18) ◽  
Author(s):  
Manesh R Patel ◽  
Kevin J Anstrom ◽  
Eric L Eisenstein ◽  
Ralph G Brindis ◽  
Eric D Peterson ◽  
...  
Keyword(s):  
Coronary Artery Disease ◽  
Coronary Artery ◽  
Positive Predictive Value ◽  
Stress Testing ◽  
Stress Test ◽  
Test Results ◽  
Invasive Angiography ◽  
Data Registry ◽  
Artery Disease ◽  
National Cardiovascular

Background: In stable patients without known coronary artery disease (CAD), clinical practice guidelines recommend documentation of ischemia prior to evaluation by invasive angiography. We sought to determine how often non-invasive stress testing is performed in this population and the association between stress test results and obstructive CAD. Methods: Patients undergoing cardiac catheterization for exclusion of CAD who were without prior history of myocardial infarction, PCI, or CABG were identified from 601 hospitals using the American College of Cardiology National Cardiovascular Data Registry between 2005 – 2007. Significant obstructive CAD was defined as the presence of any stenosis ≥ 50% left main or ≥ 70% major epicardial vessel. Patient demographics, risk factors, symptoms, stress test status and CAD presence were determined. Results: A total of 376,430 patients without known CAD were identified. The median age was 61 years, 53% were male, 26% had diabetes, and 69% had hypertension. At angiography, 142,912 (38%) of patients were found to have significant obstructive CAD. Symptom status was associated with the presence of CAD (stable angina 50%, atypical 25%, asymptomatic 40%; p<0.001). Stress testing was performed in 316,248 (84%) of patients prior to angiography, and results were associated with the presence of CAD (p<0.001) see Table . Although a positive stress test was noted in 255,617 (68% of patients undergoing cath), obstructive CAD was noted in only 105,435, yielding a positive predictive value of 41%. Conclusions: In a large national registry of stable patients without known CAD undergoing invasive angiography, only 38% were found to have significant obstructive disease. Although performed in 84% of patients prior to cath, the low positive predictive value of current stress tests may have contributed to the high rate of patients without obstructive CAD. Table p value for stress test results and presence of obstructive CAD p<0.001

scholarly journals Relation of abnormal cardiac stress testing with outcomes in patients undergoing renal transplantation

PLoS ONE ◽  
2021 ◽  
Vol 16 (12) ◽  
pp. e0260718
Author(s):  
Kelsey Anderson ◽  
Chirag Bavishi ◽  
Dhaval Kolte ◽  
Reginald Gohh ◽  
James A. Arrighi ◽  
...  
Keyword(s):  
Renal Transplantation ◽  
Renal Transplant ◽  
Stress Testing ◽  
Stress Test ◽  
Major Adverse Cardiovascular Events ◽  
Cardiac Stress ◽  
Cardiac Stress Testing ◽  
Artery Disease ◽  
Test Result

Cardiovascular risk stratification is often performed in patients considered for renal transplantation. In a single center, we sought to examine the association between abnormal stress testing with imaging and post-renal transplant major adverse cardiovascular events (MACE) using multivariable logistic regression. From January 2006 to May 2016 232 patients underwent renal transplantation and 59 (25%) had an abnormal stress test result. Compared to patients with a normal stress test, patients with an abnormal stress test had a higher prevalence of dyslipidemia, diabetes mellitus, obesity, coronary artery disease (CAD), and heart failure. Among those with an abnormal result, 45 (76%) had mild, 10 (17%) moderate, and 4 (7%) severe ischemia. In our cohort, 9 patients (3.9%) had MACE at 30-days post-transplant, 5 of whom had an abnormal stress test. The long-term MACE rate, at a median of 5 years, was 32%. After adjustment, diabetes (OR 2.37, 95% CI 1.12–5.00, p = 0.02), CAD (OR: 3.05, 95% CI 1.30–7.14, p = 0.01) and atrial fibrillation (OR: 5.86, 95% CI 1.86–18.44, p = 0.002) were independently associated with long-term MACE, but an abnormal stress test was not (OR: 0.83, 95% CI 0.37–1.92, p = 0.68). In conclusion, cardiac stress testing was not an independent predictor of long-term MACE among patients undergoing renal transplant.

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