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Clinical Applications
• Congestive Heart Failure (CHF)
• Hypertension
• Dystrophies requiring a pacemaker
• Titrating therapies
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Patient Profile: Acute Decompensated Heart Failure**
SYMPTOMS: Shortness of breath, central and peripheral edema, hypertension.
Three CVGs show a patient from assessment through four hours of therapy. |
FIRST TEST. Differences from Normal: Systole shows decreased amplitude C wave; upstroke slope is decreased. Overall image of contractile dysfunction. Diastole shows increased height and breadth of O wave meaning venous congestion. [1]
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WITHIN ONE HOUR of treatment. Patient is responding to treatment with diuretic and vasodilators. Systole is lengthened while diastole shows a normalizing O wave and shortened Isovolumic Relaxation Time.
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WITHIN FOUR HOURS of continued treatment. Overall tightening of entire cardiac cycle and mean arterial pressure normalizes.
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AcQtrac References/Notes:
**Note: The diagnoses and interpretation of these patient case studies are the expressed clinical opinion of Richard Summers, M.D., Professor, Department of Emergency Medicine and Assistant Professor, Department of Physiology and Biophysics, University of Mississippi Medical Center. The information contained herein is illustrative of Dr. Summers’ use of the AcQtrac System in his practice. The AcQtrac System is a noninvasive hemodynamic monitor based on the technology of impedance cardiography. Clinical interpretation and conclusions of the noninvasive data provided by the AcQtrac System are the responsibility of the physician.
[1] Waltjer et al. Am Heart J. 1997; 134 (3):450-5
Caution: The AcQtrac System is intended only as an adjunct in patient assessment. It must be used in conjunction with clinical signs and symptoms and other available clinical information. |
