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Increased intraventricular velocities

An unrecognized cause of systolic murmur in adults

^a Department of Medicine, Tucson Veterans Affairs Medical Center and University of Arizona, Sarver Heart Center, Tucson, Arizona, USA

View larger version (97K): [in a new window]   Figure 1 Upper panel, Doppler color flow imaging demonstrating color aliasing and turbulent flow around the proximal septum during systole. Lower panel, Pulsed wave Doppler interrogation at the mid-ventricle demonstrating an IIV. Note mid to late systolic peak and relatively lower velocities as compared with those obtained in hypertrophic obstructive cardiomyopathy.

View larger version (13K): [in a new window]   Figure 2 (A) Percent LV fractional shortening and (B) LVEF in patients with and without IIVs. Data points are presented with the superimposed mean value (thick line) and standard deviation (thin lines).

View larger version (13K): [in a new window]   Figure 3 (A) Left ventricular mass index and (B) RWT in patients with and without IIVs. Data points are presented with the superimposed mean value (thick line) and standard deviation (thin lines).

View larger version (85K): [in a new window]   Figure 4 Pulsed wave Doppler representation of IIV before (A) and after (B) the Valsalva maneuver.