From Allegheny University Hospital, Hahnemann Division, Philadelphia, Pa.
Correspondence to Dean G. Karalis, MD, Allegheny University Hospital, Hahnemann Division, Broad and Vine, Mail Stop 313, Philadelphia, PA 19102.
Left ventricular thrombi
can occur after acute myocardial infarction or in patients with chronic
left ventricular dysfunction. Stasis of blood within areas
of akinesis or dyskinesis is thought to be the mechanism by which
thrombi form. Cardioembolic stroke is the most feared complication of
left ventricular thrombi.
A 37-year-old man with progressive heart failure after myocardial
infarction was found to have severe left ventricular
dysfunction and a left ventricular posterobasal
pseudoaneurysm. The patient underwent patch repair of the
pseudoaneurysm and coronary artery bypass graft
surgery. Intraoperative transesophageal
echocardiography was used to image the heart
throughout the surgical procedure. After separation of the patient from
cardiopulmonary bypass, left ventricular function
remained severely depressed, and a protruding and mobile thrombus was
observed to form at the left ventricular apex, a site
distinct from the aneurysm repair. The left
ventricular thrombus took only several minutes to develop
and then embolized from the heart into the
peripheral arterial circulation
(Figure
Footnotes
The editor of Images in Cardiovascular
© 1998 American Heart Association, Inc.
Images in Cardiovascular Medicine
Left Ventricular Thromboembolism
). Surprisingly, the patient
suffered no neurological sequelae. The patient was discharged home
without complications on chronic anticoagulation therapy with warfarin.

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Figure 1. Serial transesophageal
echocardiographic images as left
ventricular thrombus embolized into
peripheral arterial circulation. 1, A
protruding and mobile thrombus is seen at left ventricular
(LV) apex. 2, Thrombus has embolized and is now floating free
in LV cavity. 3, Thrombus is now below aortic valve in LV outflow
tract. 4, Thrombus has embolized distally out of heart into
peripheral arterial circulation. LA indicates
left atrium.
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