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Figure 4 Septal TDI Tracing in Patient With Nonobstructive HCM Compared With Severe Obstructive HCM
(Top) Tissue Doppler imaging (TDI) tracing of a nonobstructed patient. (Bottom) TDI of a severely obstructed patient. Note the shortened duration of systolic septal contraction in the obstructed patient. The white arrows point to the beginning and the end of septal contraction, excluding the isovolumetric contraction. HCM = hypertrophic cardiomyopathy.
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