Correlation of impedance minute ventilation with measured minute ventilation in a rate responsive pacemaker
| Autor: | Yong K. Cho, Donald N. Jensen, Reto Candinas, Bruce L. Wilkoff, Catherine R. Condie, Gerald A. Portzline, Christopher R. Cole, Stuart W. Adler, Linda P. Nelson, Firat Duru |
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| Rok vydání: | 2001 |
| Předmět: |
Adult
Male medicine.medical_specialty Pacemaker Artificial Internal medicine Heart rate medicine Electric Impedance Gas analysis Humans Third order polynomial Intensive care medicine Electrical impedance Implanted pacemaker business.industry General Medicine Treadmill testing Middle Aged First order Cardiology Exercise Test Female Cardiology and Cardiovascular Medicine business Pulmonary Ventilation Respiratory minute volume |
| Zdroj: | Pacing and clinical electrophysiology : PACE. 24(6) |
| ISSN: | 0147-8389 |
| Popis: | Although rate responsive pacing based on impedance minute ventilation (IMV) is now standard, there is almost no data confirming the relationship between IMV from an implanted pacemaker and measured minute ventilation (VE) during exercise. Nineteen completely paced adults implanted with Medtronic Kappa 400 pacemakers underwent symptom-limited maximal metabolic treadmill testing using a modified Minnesota Pacemaker Response Protocol. Minute ventilation (VE, L/min) was simultaneously measured using the flowmeter of a respiratory metabolic gas analysis system and the transthoracic impedance minute ventilation circuitry of the pacemaker. Correlation coefficients (r) were used to find the best fit line to describe the relationship between the two measurements. Mean (+/- SD) r values for the first, second, and third order polynomial equations and for log and exponential equations were: 0.92 +/- 0.08, 0.94 +/- 0.04, 0.95 +/- 0.04, 0.91 +/- 0.06, and 0.91 +/- 0.07, respectively. None of the r values were statistically different from the first order equation. Transthoracic IMV as measured by the Medtronic Kappa 400 is closely correlated to measured minute ventilation and is represented well by a first order (linear) equation. |
| Databáze: | OpenAIRE |
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