What measurement indicates LV mechanical dyssynchrony?

The measurement that indicates left ventricular (LV) mechanical dyssynchrony is identified as more than 130 milliseconds. This threshold has been established in clinical practice as a marker for significant delay in the contraction timing of different segments of the left ventricle, which can adversely affect the overall efficiency of the heart's pumping action.

When the peak times of contraction in various regions of the LV differ by more than 130 milliseconds, it suggests that certain areas of the heart are not working in a synchronized manner. This lack of coordination can lead to ineffective pumping and contribute to heart failure symptoms.

The threshold of 130 milliseconds provides a critical cutoff for clinicians to assess potential interventions, such as cardiac resynchronization therapy, to improve synchrony and overall heart function. Monitoring these timings through echocardiography allows sonographers and cardiologists to diagnose dyssynchrony and tailor treatment strategies accordingly.