Computer assisted optimization of cardiac resynchronization by Raz Miri PDF

By Raz Miri

ISBN-10: 3866443609

ISBN-13: 9783866443600

The efficacy of cardiac resynchronization remedy (CRT) via biventricular pacing (BVP) has been tested by way of a variety of reports in sufferers struggling with congestive middle failure. with the intention to in achieving a tenet for optimum therapy with BVP units, an automatic non-invasive procedure in keeping with an electrophysiological laptop version of the center is gifted. The provided learn investigates an off-line optimization set of rules according to assorted electrode positioning and timing delays

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17) Maximal oxygen consumption (VO2max ): VO2max is reached when oxygen consumption remains at a steady state despite an increase in workload during clinical exercices. 4. Cardiac Function Parameters 39 where CO is the cardiac output of the heart, CaO2 is the arterial oxygen content, and CvO2 is the venous oxygen content. Ratio of early to late ventricular filling (E/A): Echocardiographic phases of ventricular filling are defined as early E-wave and atrial A-wave. The area under the E-wave reflects the rapid filling phase in LV diastolic filling.

The RVOT is divided horizontally by a line midway between the pulmonary valve and the lower border, forming an upper and lower half. These two halves can be divided vertically by a line that connects the pulmonary valve to the RVOT lower border and in this way dividing the RVOT into the right ventricular septal and free wall. The created quadrants define high and low septal RVOT and high and low free-wall RVOT positions. 3. Biventricular Pacing 49 pacing in the right ventricular free wall manifests as a positive QRS morphology in lead I.

As the heart pumps against elevated pressure in the blood vessels, the left ventricle becomes enlarged (hypertrophy) and the amount of blood pumped by the heart each minute (cardiac output) decreases. Without treatment, symptoms of congestive heart may develop [127]. 5. Diastolic heart failure: Some patients with heart failure have preserved systolic function or a normal left ventricular ejection fraction. Although such hearts contract normally, relaxation (diastole) is abnormal. Cardiac output, especially during exercise, is limited by the abnormal filling characteristics of the ventricles.

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Computer assisted optimization of cardiac resynchronization therapy by Raz Miri

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