Key result
Abrupt coronary occlusion impairs left ventricular relaxation more profoundly than gradual occlusion.
Why the study?
The effects of gradual versus abrupt coronary occlusion on regional wall function and left ventricular relaxation were not fully understood.
Does abrupt versus gradual coronary occlusion produce different effects on regional wall function and left ventricular relaxation in an intact dog heart model?
Does abrupt versus gradual coronary occlusion produce different effects on regional wall function and left ventricular relaxation in an intact dog heart model?
The time course of coronary occlusion (abrupt vs. gradual) dictates distinct patterns of regional dysfunction and ventricular relaxation, highlighting the potential role of collateral flow in gradual ischemia.
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Different ischaemic patterns in canine models warrant mechanistic follow-up; leaves open human translation.
Doyle et al. (1987) studied Coronary occlusion / ischaemic dysfunction. Abrupt coronary occlusion vs. Gradual coronary occlusion was evaluated on Regional wall function and left ventricular relaxation (peak negative dP/dt and tau). Abrupt coronary occlusion had a more profound effect on left ventricular relaxation than gradual occlusion, producing distinct patterns of regional dysfunction depending on the time course of ischaemia.
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