Ischaemia Detection and Viability Assessment · 2021. 5. 20. · kinesis Hyperkinesis = Normal...
Transcript of Ischaemia Detection and Viability Assessment · 2021. 5. 20. · kinesis Hyperkinesis = Normal...
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3rd Stress Echo Interpretation Course
Harald Becher MD PhD
Professor of Medicine
Heart&Stroke Foundation Chair
Alberta Heart Institute, Canada
Ischaemia Detection and Viability
Assessment
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Questions to be answered after
stress echocardiography
Is there significant coronary heart disease with
>50%coronary stenosis?
Which coronary artery territories are involved?
What is the risk of cardiac events (MACE)?
Is coronary angiography/intervention
indicated?
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Coronary Flow and LV wall motion
H Becher, A Helfen
Contrast echocardiography
Compendium for clinical Practice
Springer 2019
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Coronary Flow and LV wall motion
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Severity of chest pain
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Echo trumps ECG
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rest 25 Watts
or 10 µg/kg/min
dobutamine
peak stress recovery
end-systolic frames
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Territories of the coronary arteries
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Rest + Stress = Diagnosis
Normo- + Normo/
kinesis Hyperkinesis = Normal
Hypo- Normo/
Kinesis + Hyperkinesis = Normal
Normo-/ + Hypo, A,Dyskinesis = Ischaemia
Hypo-
Kinesis + A, Dyskinesis = Ischaemia
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Becher H, Helfen A. Contrast Echocardiography – Compendium for clinical Practice, Springer 2019
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Management after stress echocardiography
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Remember
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Referral to coronary angiography
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Indication for viability testing in patients with heart failure
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Echocardiographic Methods for Assessment of Myocardial Viability
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Low dose dobutamine stress echocardiography
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Stress Echo in Patients with Chest Pain
and no previous history of CAD
591 patients
67 (11%) 524 (89%)
myocardial ischemia normal
coronary angiography
> 50% coronary stenosis
37/66 (56%)
Ahmadvazir S et al. Am Heart J 2014; 168:229-36
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JASE 2010; (23) 207-214
• 1,477 patients with positive stress echo
• All underwent coronary angiography
• 480 (32.5%) had “false-positive” results
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From AM, JASE 2010
The Mayo Clinic Experience:
1,477 patients with positive stress echo
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Mortality According To
Stress Echo Results
The outcomes of patients with false-
positive results were similar to those of
patients with true-positive results.
This finding suggests that patients with
false-positive results on stress
echocardiography should still receive
intensive risk factor management and
careful clinical follow-up.
From AM, JASE 2010
Dobutamine stress echo
n s
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Benefits of adding perfusion imaging in
Dobutamine Stress Echocardiography
Higher diagnostic confidence for exclusion significant CAD
Normal perfusion at peak stress reassuring in segments with questionable wall
motion
Normal perfusion probably reassuring when target heart rate is not achieved
Higher sensitivity for detection CAD and microvascular disease
More accurate assessment of ischemic burden
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Risk Assessment in Dobutamine Stress Echo
Segments
with
WMA 0 0 1 or 2 1 or 2 > 3 > 3
abnormal
perfusion 0 any
segments
with WMA
and in
adjacent
segments
with no
WMA
segments
with WMA
and in
adjacent
segments
with no
WMA
probability
of coronary
stenoses
>70%
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Contrast Echocardiography – Training Requirements
Physicians should participate in a course on
contrast echocardiography
They should have basic life support (BLS)
training.
They should perform and interpret at least 25
contrast echo studies under supervision.
They should maintain competency by
performing at least 50 contrast studies per year.
2017 EACVI Clinical practice of contrast echocardiography: recommendation
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Pre- and Post stress echo classification
Zacharias K et al. European Heart Journal – CVI (2017) 18, 195–202
Exercise ECG Exercise Echo