Steven J. Lester MD, FRCP(C), FACC, FASE Relevant Financial Relationship(s) None Off Label Usage None
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1 Steven J. Lester MD, FRCP(C), FACC, FASE Relevant Financial Relationship(s) None Off Label Usage None 1
2 2,000 Noninvasive Procedures 1,600 Units of Service/ 1,000 Beneficiaries 1, Evaluation and Management 400 Invasive Procedures Andrus and Welch, Circ Cardiovasc Qual Outcomes. 2012;5: Journal of Cardiac Failure Vol. 20 No
3 Appropriate Use ECG uninterpretable Symptomatic Unable to exercise Intermediate (10-90%) to high (>90%) pretest likelihood** Asymptomatic Typical (Definite): 1. Substernal chest pain or discomfort; 2. provoked by exertion or emotional stress; 3. relieved by rest and/or nitrogylcerin Atypical (Probable): Chest pain or discomfort that lacks one of the Characteristics for definite or typical angina. Nonanginal Chest Pain: Chest pain or discomfort that meets one or none of the Typical angina characteristics. 3
4 Appropriate Use ECG uninterpretable Symptomatic Asymptomatic Unable to exercise Intermediate (10-90%) to high (>90%) pretest likelihood** High risk of CAD event or Intermediate risk (unable to exercise or ECG uninterpretable^ High Coronary Calcium Score (> AU) Reduced Perfusion Decline in function Abnormal ECG Symptoms Occlusion Time Sensitivity Specificity 4
5 16.7% of patients who did not develop chest pain or ischemic ECG changes developed new or worsening regional wall motion abnormalities (+ Exercise Echo) Significant prognostic implications for predicting Mortality and MACE. J Am Coll Cardiol 2009;53: Characteristics and Outcomes of Patients With Abnormal Stress Echocardiograms and Angiographically Mild Coronary Artery Disease <50% Stenosis or Normal Coronary Arteries J Am Soc Echocardiogr 2010;23:
6 Surviving Surviving 4/4/2017 Dobutamine Outcome Exercise <50% stenoses ( false-positive ) <50% stenoses ( false-positive ) 50% stenoses ( true-positive ) 50% stenoses ( true-positive ) P=0.13 P=0.49 Years Years From et al. J Am Soc Echocardiogr 2010;23:
7 73 year old male No antecedent CV disease history. Asymptomatic Reduced functional capacity due to orthopedic limitations Hypertension, diabetes Pre-operative cardiac risk stratification prior to an orthopedic procedure Ischemic Heart Disease, Cerebral Vascular Disease, Compensated or prior heart failure, Diabetes (requiring insulin), Renal Insufficiency (Scr > 2.0) May be appropriate Appropriate Poor or Unknown Functional Capacity (<4 METs) - Intermediate-risk surgery - > 1 clinical risk factor - Vascular surgery - > 1 clinical risk factor - Kidney Transplant - Liver Transplant Journal of Cardiac Failure Vol. 20 No
8 2014 ACC/AHA Guideline on Perioperative Cardiovascular Evaluation and Management of Patients Undergoing Noncardiac Surgery 8
9 9
10 10
11 1. Stress Modalities 2. Interpretation 3. Test Characteristics: Diagnosis 4. Prognostic Value 5. Safety 6. Other Uses 7. Appropriate Use 11
12 Modalities Treadmill Bicycle -Supine -Upright Pharmacologic Dobutamine / Atropine Vasodilator -Dipyradamole -Adenosine Other Handgrip Pacing Rest A4C Treadmill Stress A4C Most common is multistage Bruce protocol Modified Stress Bruce and Naughton Stress protocols are lower intensity A4C exercise protocols A4C used in those with limited exercise capacity Cornell protocol provides a more gradual increase in speed and incline compared to the Bruce protocol 12
13 Bicycle The cycles are calibrated in kiloponds or Watts which can then be converted to metabolic equivalents (METs). It may allow image acquisition during exercise Doppler information. Hemodynamic Effects Duration and Maximum Workload > Heart Rate > End-diastolic Volume > Mean Arterial Pressure > Wall Stress > Myocardial Oxygen Demand > Filling Pressures > 13
14 Absolute ST elevation 1 mm in leads without Q waves Ventricular tachycardia Decrease in systolic blood pressure > 10 mm Hg from baseline with other signs of ischemia Moderate to severe angina Nervous system symptoms Signs of poor perfusion (cyanosis, pallor) Technical difficulties with ECG or blood pressure monitoring Patient s desire to stop Indications To Stop Relative Arrhythmias other than ventricular tachycardia ST or QRS changes including horizontal or downsloping ST depression > 2 mm Development of bundle branch block or intraventricular conduction delay that cannot be distinguished from ventricular tachycardia Increasing chest pain Decrease in systolic blood pressure > 10 mm Hg from baseline without other signs of ischemia Fatigue, shortness of breath, wheezing, leg cramps, claudication Hypertensive response (> 250 mm Hg systolic and/or > 115 mm Hg diastolic) Pharmacologic Inotropic / Dobutamine Dobutamine acts directly on β-1 adrenergic receptors Increase in HR and Contractility (4x in normal subjects and < 2x in those with DCM) As dobutamine dose increases there is a greater β-2 response resulting in peripheral vasodilation which may lead to a drop in BP Compared with exercise LV volumes and wall stress increase less with dobutamine. 14
15 Pharmacologic Vasodilators Dipyridamole, adenosine, regadenoson Small decrease in BP and increase in HR If obstructive epicardial disease or microcirculatory dysfunction Heterogeneity of coronary blood flow between areas subtended by stenosis Vs. normal coronary arteries. Lang RM et al. J Am Soc Echocardiogr 2015;28:
16 Lang RM et al. J Am Soc Echocardiogr 2015;28:1-39 Interpretation Change in LV Ejection Fraction Increase EF: Normal (global contractile reserve in patients with no resting dysfunction is defined by > 5% increase in LVEF) No change or decrease: Abnormal Change in LV end-systolic size / volume Decrease: Normal (Flow reserve is defined by > 20% increase in forward stroke volume) No change or increase: Abnormal (**supine bike) Regional LV Function Evaluation Wall thickening, Wall motion Score Index 16
17 1 = Normal or hyperdynamic: (systolic increase in thickness >50%) 2 = Hypokinetic: delay in the velocity or onset of contraction (<30-40% systolic increase in thickness) 3 = Akinesis or minimal thickening: <10% 4 = Dyskinetic: Systolic outward motion of the segment 5 = Aneurysmal: Bulging during systolic and diastole Wall Motion Score Index = 1.0 Wall Motion Score Index = 38/16 =
18 Rest Stress Interpretation Normokinetic Normal-hyperkinetic Normal Normokinetic Hypokinetic Resting Dysfunction Resting Dysfunction Wall Motion abnormality (segment worsens function) Akinetic / Dyskinetic (segment worsens function) Fixed / No Change in Function Slow Sustained Improvement Ischemic Response Ischemic Response Infarct / Necrotic Stunning or Cardiomyopathy Resting Dysfunction Biphasic Response Hibernating Akinetic Dyskinetic Passive / Mechanical Wall Motion Abnormalities at Rest Ischemic heart disease -Infarction -Stunned / Hibernating Conduction -Pacing -LBBB Cardiomyopathy Myocarditis Right ventricular volume / pressure overload 18
19 Function Function Function 4/4/2017 Blood Flow Ventricular Function Time Dobutamine Dose Blood Flow Time Ventricular Function 19
20 Wall Motion Abnormalities at Rest Ischemic heart disease -Infarction -Stunned / Hibernating Conduction -Pacing -LBBB Cardiomyopathy Myocarditis Right ventricular volume / pressure overload Conduction 20
21 Lang RM et al. J Am Soc Echocardiogr 2015;28:1-39 Conduction 21
22 Wall Motion Abnormalities Wall Motion Abnormalities at Rest during Stress Ischemic heart Ischemia disease with -Infarction obstructive epicardial -Stunned / Hibernating CAD Ischemia in the absence of epicardial obstruction -hypertensive response Conduction -Pacing -LBBB -microvascular disease Cardiomyopathy Myocarditis Cardiomyopathy Right ventricular Rate-related volume / LBBB pressure overload Pulmonary Diameter Stenosis < 85% narrow rest > 50% narrowing stress - collaterals - level of exertion/stress - wall thickness 22
23 Systolic Thickening (%) 4/4/2017 p< p< p = Infarct Thickness (%) Lieberman et al. Circulation 1981;63; Chordal Center Line Analysis (Centroids)
24 = Infarct = Tethered = Normal
25 Floating Epicardial 1 Center of Mass 8 2 Centroid Exercise Echo Dobutamine Echo 86 SPECT % Sensitivity Specificity Schuijf Eur J Nucl Med Mol Imaging 2006;33:93 25
26 100 Patients Pre test Likelihood 10% CAD + 10 pts Sensitivity = 90% Specificity = 80% CAD - 90 pts false - 1 pts True + 9 pts false + 18 pts 27 + tests: 33% positive predictive value True - 72 pts CAD + 40 pts 100 Patients Pre test Likelihood 40% Sensitivity = 90% Specificity = 80% CAD - 60 pts false - 4 pts True + 36 pts false + 12 pts 48 + tests: 75% positive predictive value True - 48 pts 26
27 Diagnostic Criteria Sensitivity 1 Segment, > 1 Segment, LV dilation Specificity Exercise Echo vs SPECT Tl % Ex Echo SPECT TI vessel 2 vessels 3 vessels Sensitivity Specificity Quinones et al: Circ,
28 Risk of adverse event Prognosis Detection/Exclusion CAD Diagnosis Physical or Pharmacologic Very Low Risk < 1% per year risk of MI, cardiac death or late revascularization Low Risk 1-3% per year risk of MI, cardiac death or late revascularization -submaximal stress (men <7 METS, women < 5 METS) -LVEF <40% Mertz et al. J Am Coll Cardiol 2007;49: Sicari et al. European Heart Journal (2009) 30,
29 ExEcho n=8592 DSE n= 6755 P value Total n = 5349 Safety Overall Complication of Stress RateEchocardiography 8 (0.09%) 47 (0.7%) Supervised < (0.36%) by Arrhythmia Registered Requiring Nurses: Rx 4 (0.05%) Results 39 (0.58%) of a 2-Year <0.001 Audit 43 (0.28%) of 15,404 Patients SVT / AF 4 (0.05%) 33 (0.49%) < (0.24%) VT / VF 0 6 (0.09%) < (0.04%) Markedly + / Prolonged CP requiring hospitalization Symptomatic hypotension requiring hospitalization 3 (0.03%) 5 (0.07) (0.05%) 1 (0.01%) 3 (0.04%) (0.03%) Transfer to Hospital 5 J (0.06%) Am Soc21 Echocardiogr (0.31%) :21; (0.17) Cardiac Rupture or Death
30 J Am Soc Echocardiogr 2005;18:63-8 What do we expect? E vel e vel 30
31 55 year old male No known CAD Hypertension & exertional dyspnea 31
32 Pre Post E=0.6 E/e =8 E=0.9 E/e =8 e =0.8 e = year old male No known CAD Diabetes and hypertension Complains of dyspnea on exertion (NYHA II) 32
33 E/e =6 Pre E=0.5 Post E/e =14 E=1.1 e =0.8 e =
34 Recovery 5 min Ha et al J Am Soc Echocardiol 2005;18:63-8 Those with increased filling pressure at baseline will further increase filling pressure with exercise Therefore, those who benefit most from diastolic stress testing are those with normal resting LVFP but abnormal relaxation (grade I) 34
35 Courtesy Rob McCully Ischemia 4% 10% 5% 8% Elevated LVFP Pulm HTN 6% 7% 14% None 46% Ischemia 27% Pulmonary HTN 22% Elevated LVFP 34% Any abnormality 54% n=630 Elevated LVFP: ex. E/e >13 Pulm HTN: ex. RVSP >50 mm Hg Women <5 METs, Men <7 METS Courtesy Rob McCully Ischemia 6.3% 12.5% 11.7% 6.3% 7% 11.7% Elevated LVFP 19.5% Pulm HTN Ischemia 32% Pulmonary HTN 36% Elevated LVFP 45% Any abnormality 75% n=128 None 25% Elevated LVFP: ex. E/e >13 Pulm HTN: ex. RVSP >50 mm Hg 35
36 Mayo Clinic, Rochester, MN Baseline EF, RWMAs, valves Color flow + LA Volume Diastolic E, A,E/A, Function DT RV e, systolic E/e pressure TR Vmax Post-exercise Quads for EF, LVESV resp, RWMAs + Then TR Vmax RV systolic pressure LV filling Thenpressure E, e, E/e Depressed EF / Myocardial Disease and Normal EF When Is Diastolic Stress Testing Indicated? E/A < E < 50cm/s E/A < E > 50 cm/ OR E/A > < 2 Rule of 2 s E/A > 2 Normal LAP Grade I DD 1. > Av 2 negative E/e > TR > 2.8 m/s 3. LA vol > 34 cc/m 2 If symptomatic - Consider CAD - Proceed to Diastolic Stress Test Grade III DD 36
37 RVSP (mm Hg) RVSP (mm Hg) 4/4/2017 Interpretation t Definitely Abnormal 1. Average E/e > 14 or Septal >15 2. Septal e < 7 cm/sec or J Am Soc Echocardiogr 2016;29: Lateral e < 10 cm/sec 3. Peak TR velocity > 2.8 m/sec Normal 1. Average (or septal) E/e < Peak TR velocity < 2.8 m/sec Post-TM Exercise % limit Age group (yr) < mean Rest % limit mean 10 Age group (yr) < RAP 5 mm Hg Kane et al (n=469), Slide courtesy Rob McCully 37
38 1. Exertional dyspnea portends a poor prognosis (> angina). 2. An exercise induced increase in E/e relates to changes in filling pressure and its finding has adverse prognostic significance. 3. The post exercise E/e can be measured minutes into recovery, ideally as soon as the discrete waves are appreciated. 4. The ideal patient is one with exertional dyspnea and baseline grade I diastolic dysfunction. 38
39 2014 AHA/ACC Guideline for the Management of Patients With Valvular Heart Disease Class IIa Exercise testing is reasonable in selected patients with asymptomatic severe VHD to 1) confirm the absence of symptoms, or 2) assess the hemodynamic response to exercise, or 3) determine prognosis. (Level of Evidence: B) J Am Soc Echocardiogr 2017;30:
40 Asymptomatic (Stage C) LVEF > 50% LVESD < 50mm LVEDD < 65mm LVEF > 50% Vmax <5m/s ΔPmean <60mmHg Normal ETT ΔVmax <0.3m/s/yr LVEF >60% LVESD <40mm Sinus Rhythm PASP <50mmHg Successful Repair <95% Or Mortality >1% Very Severe MVA<1cm 2 T 1/2 > Unfavorable morphology, LA clot, > mild MR Severe MVA<1.5cm 2 T 1/2 > 150 -Sinus rhythm -Afib with unfavorable morphology, LA clot, > mild MR Positive Stress Test Aortic Regurgitation* Aortic Stenosis Mitral Regurgitation Mitral Stenosis (rheumatic) Active Valve Surveillance Intervention *ACC/AHA not ESC guidelines VHD (MR, MS, AR, AS) severity not matching with symptoms Asymptomatic moderate-severe VHD (MR, MS, AR, AS) Symptoms, Δ blood pressure, exercise tolerance Valve Ventricle Hemodynamics Δ 18-20mmHg MPG in AS MPG >15-18mmHg in MS >10-13mm 2 EROA in MR Δ < 4-5% LVEF (lack of CR) Δ < 2% GLS (lack of CR) Δ SV < 20% (lack or FR) Δ E/e (LV filling pressure) Δ WMSI (ischemia) PH (SPAP > 60mmHg) LV dyssynchrony RV dysfunction (TAPSE < 19mm) Match symptoms with the cardiac involvement Risk stratification Guide decision making and guide optimal timing for valve intervention J Am Soc Echocardiogr 2017;30:
41 Baseline Doppler hemodynamics Class IIa AVR is reasonable in symptomatic patients with lowflow/low-gradient severe AS with reduced LVEF (stage D2) with a low-dose dobutamine stress study that shows an Vmax aortic Mean > velocity 4.0m/sec gradient > m/s (or mean pressure Mean gradient > 40 mm Hg) with a AVA < 1.0cm AV Area 2 valve area < 1.0 cm2 at any AV Area dobutamine dose True Severe AS (D2) IIa Pseudo Severe AS 1. Understand the differences and indications for the various stress modalities. 2. Know the walls and their coronary supply. 3. Understand the methods and interpretation of wall motion. 4. Viability: stunning versus hibernation. 5. Understand the test characteristics. 6. Emerging uses: Valve Disease and SOB. 7. Appropriate use. 41
42 42
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