What question did this study set out to answer?

To evaluate the effectiveness of ergospirometry in determining the functional significance of myocardial ischemia compared to traditional methods.

January 27, 2026Open Access

Ergospirometry in the assessment of functional significance of myocardial ischemia

Q: What does this research mean for the field?

Ergospirometry significantly improves the sensitivity of ECG exercise stress tests for detecting myocardial ischemia beyond echocardiographic changes. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.NEUTRAL.

Key Result

Ergospirometry significantly improved the sensitivity of ECG exercise stress tests for detecting myocardial ischemia beyond echocardiographic changes.

Key Points

To evaluate the effectiveness of ergospirometry in determining the functional significance of myocardial ischemia compared to traditional methods.
Conducted combined stress echocardiography with cardiopulmonary exercise testing (ESE-CPET)
Assessed key parameters like peak myocardial oxygen consumption (PeakVO2) and ventilatory function
Monitored changes in ejection fraction and oxygen pulse during exercise.
Ergospirometry showed improved sensitivity compared to ECG exercise stress testing.
Identified significant dyssynergia and decreased ejection fraction during ischemia assessment.
Observed markers of ischemia appeared before echocardiographic changes and ECG alterations.

Structured PICO

Does combined stress echocardiography with cardiopulmonary exercise test (ESE-CPET) detect myocardial ischemia in a patient with LBBB and unexplained dyspnea?

Population

1 adult male (n=1), 50 years old, with exertional dyspnea, well-controlled arterial hypertension, hypercholesterolemia, and left bundle branch block (LBBB).

Intervention

Combined stress echocardiography with cardiopulmonary exercise test (ESE-CPET)

Outcome

Detection of myocardial ischemia and functional significancesurrogate

ESE-CPET can effectively detect functionally significant myocardial ischemia even in patients with LBBB where standard ECG interpretation is difficult.

Main Result

Absolute Event Rate: 0% vs 0%

Abstract

It has been shown that the ECG exercise stress test (ET) has low sensitivity and this limitation is successfully overcome by combinations with imaging techniques (stress echocardiography (ESE), nuclear medicine, magnetic resonance). Despite improved accuracy in the detection of myocardial ischemia and segmental wall motion analysis, these combinations cannot precisely determine the significance of functional impairment. Thus, the application of ergospirometry significantly improved the sensitivity of ECG ET. In addition to the fact that the most important parameters of CPET are peak myocardial oxygen consumption (PeakVO2) and assessment of ventilatory function, there are specific CPET markers. Significant myocardial ischemia ( 10% of the left ventricular myocardium i.e 3 segments) leads to significant dyssynergia (hypo or akinesia) inducing transient decrease in the ejection fraction. We can detect this point as a plateau (flattening) of the oxygen pulse (VO2/HR) as a consequence of decreased stroke volume and, also, the inadequate increase in VO2 despite the increase of the workload load. These markers appear after echocardiographic changes, and before ECG changes and chest pain on the ischemic cascade of events. We presented a case of a patient with complete left branch block and suspected coronary heart disease who showed typical changes on CPET, and a significant narrowing of LAD on coronary angiography. We used combined stress echocardiography with CPET (ESE-CPET) to confirm ischemia.

Mark Helpful

Bookmark

Relay

View Full Paper