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[Left ventricular function in patients with chronic ischemic cardiopathy: relationship with the status of myocardial
1Cattedra di Medicina Nucleare, Centro per la Medicina Nucleare del CNR, Università Federico II, Napoli.
Insights
In chronic coronary artery disease (CAD), severe perfusion defects significantly impair left ventricular systolic and diastolic function, especially when the left anterior descending artery is involved.
Area of Science:
- Cardiology
- Nuclear Medicine
- Medical Imaging
Background:
- Chronic coronary artery disease (CAD) affects left ventricular function.
- Assessing myocardial perfusion is crucial for understanding CAD.
- Radionuclide angiography and SPECT offer insights into cardiac function and perfusion.
Purpose of the Study:
- To evaluate left ventricular function in relation to myocardial perfusion in chronic CAD patients.
- To determine the impact of severe irreversible perfusion defects on systolic and diastolic function.
- To investigate the specific effects of left anterior descending artery involvement on cardiac function.
Main Methods:
- Thirty-two patients with chronic CAD underwent radionuclide angiography and thallium-201 (TI-201) SPECT.
- Computed ejection fraction (EF), peak filling rate (PFR), and coefficient of variation of the regional time to PFR (CV-TPFR).
- Compared functional parameters between patients with and without severe irreversible perfusion defects.
Main Results:
- Patients with severe irreversible defects showed significantly lower EF and PFR compared to those without.
- Involvement of the left anterior descending artery territory correlated with lower EF, PFR, and higher CV-TPFR.
- Severe irreversible perfusion defects were strongly associated with reduced left ventricular ejection fraction and peak filling rate.
Conclusions:
- Left ventricular systolic and diastolic function are more deteriorated in chronic CAD patients with left anterior descending artery involvement.
- Severe irreversible perfusion defects are linked to significantly impaired left ventricular systolic (EF) and diastolic (PFR) function.
- Myocardial perfusion status is a critical determinant of left ventricular function in chronic CAD.
Abstract:
The aim of this study was the evaluation of left ventricular function compared to myocardial perfusion in patients with chronic coronary artery disease (CAD). Thirty-two patients with chronic CAD (27 men and 5 women, mean age 58 +/- 9 years) underwent radionuclide angiography and rest-redistribution thallium-201 (TI-201) single photon emission Computed Tomography (SPECT). Ejection fraction (EF, %), peak filling rate (PFR, end diastolic volume/second), and the coefficient of variation of the regional time to PFR (CV-TPFR, %) were computed. Patients with severe irreversible defects (i.e. with TI-201 uptake < 50%) had lower EF (42 +/- 7% vs 52 +/- 11%, p < 0.01) and lower PFR (1.9 +/- 0.4 vs 3.1 +/- 1.0, p < 0.0005) than those without. Patients with severe irreversible perfusion defects in the left anterior descending artery territory had lower EF (41 +/- 6% vs 50 +/- 11%, p < 0.01), lower PFR (1.8 +/- 0.3 vs 2.8 +/- 1.0, p < 0.005), and higher CV-TPFR (39 +/- 22 vs 13 +/- 7, p < 0.001) than those without. The results of the present study indicate that in patients with chronic CAD left ventricular systolic and diastolic function is more deteriorated when the left anterior descending artery is involved. Similarly, the presence of severe irreversible perfusion defects is clearly associated with significantly lower EF and PFR.