The time interval for the peak gradient to reach its midpoint (pressure half time) should not be used, in patients with high filling pressures, ASDs, significant AR or immediately after balloon valvuloplasty as it can underestimate the severity of MS.
Robert O Bonow, Blase A Carabello et al.
Oh J, Seward JB, Tajik AJ.
Kern MJ.
The time interval for the peak gradient to reach its midpoint (pressure half time) should not be used, in patients with high filling pressures, ASDs, significant AR or immediately after balloon valvuloplasty as it can underestimate the severity of MS.
Robert O Bonow, Blase A Carabello et al.
Oh J, Seward JB, Tajik AJ.
Kern MJ.
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