Surgery – Diagnostic testing – Cardiovascular
Reexamination Certificate
2004-05-13
2008-08-26
Getzow, Scott M (Department: 3762)
Surgery
Diagnostic testing
Cardiovascular
C607S023000
Reexamination Certificate
active
07416529
ABSTRACT:
An implantable medical apparatus for detecting diastolic heart failure, DHF, has a DHF determining device for determining at least one blood pressure parameter for detecting a DHF state of the heart of a patient. The DHF determining device has a pressure measuring unit for measuring the absolute value of left atrial pressure during the diastasis phase just before atrial contraction, or the absolute value of the pressure in the pulmonary vein when the pulmonary valve is closed, for a predetermined workload situation and a rest situation of the patient. A comparator compares the difference between left atrial pressure or pulmonary vein pressure, in the workload and rest situations, with a predetermined pressure difference reference value. A pacemaker includes such an apparatus and a control unit that optimizes pacing therapy depending on the result of the comparisons with the reference values. In a corresponding method of detecting diastolic heart failure, DHF at least one blood pressure parameter for detecting a DHF state of the heart of a patient is determined. The absolute value of left atrial pressure is measured during the diastasis phase just before atrial contraction, or the absolute value of the pressure in the pulmonary vein when the pulmonary valve is closed, for a predetermined workload situation and a rest situation of the patient. The difference between left atrial pressure or pulmonary vein pressure in said workload and rest situations is compared with a predetermined pressure difference reference value.
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patent: 1 348 375 (2003-10-01), None
patent: WO 01/36014 (2001-05-01), None
“Mechanisms, Diagnosis, and Treatment of Diastolic Heart Failure,” Lenihan et al, American Heart Journal, vol. 130 (1995) pp. 153-166.
“Pathophysiological Characterization of Isolated Diastolic Heart Failure in Comparison to Systolic Heart Failure,” Kitzman et al, Journal of the American Medical Association, vol. 288, No. 17 (Nov. 6, 2002) pp. 2144-2150.
Getzow Scott M
Schiff & Hardin LLP
St. Jude Medical AB
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