The Reliability of Rate‐Pressure Product as an Index of Myocardial Oxygen Consumption in Atrial Synchronized Versus Fixed Rate Ventricular Pacing
The Reliability of Rate‐Pressure Product as an Index of Myocardial Oxygen Consumption in Atrial Synchronized Versus Fixed Rate Ventricular Pacing
复制标题
心房同步起搏与固定速率心室起搏中心率-压力乘积作为心肌耗氧量指标的可靠性
DOI：
10.1111/j.1540-8159.1989.tb05028.x
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发表时间：
1989
期刊：
影响因子：
--
通讯作者：
H. Astrom
中科院分区：
文献类型：
--
作者：
R. Nordlander;S. Pehrsson;H. Astrom
Consumption in Atrial Synchronized Versus Fixed Rate Ventricular Pacing. The product of heart rate and blood pressure was tested as an index of myocardia] oxygen consumption (MVO2J and compared with directly determinisd MVO2 during ventricular demand fWI] fixed rate pacing and atrial synchronized (VAT] pacing at rest and during exercise. Systolic brachial artery pressure, pulmonary wedge pressure and MVO2 were similar in the two pacing modes and showed similar response to exercise. The correlation between rate‐pressure product and MVO2 was closer with VAT than with WI pacing (r = 0.74 and r = 0.64, respectively], and the latter value was not improved by using the product of atrial rate and systolic pressure (r = 0.61). The rate‐pressure product was significantly higher during VAT pacing compared to WI during exercise, although MVO2 was similar. The similarity of MVO2 during exercise indicated some other contributory factor than heart rate in WI pacing, probably increase of contractility and/or volume. Because such factors are not included in currently used indices of MVO2 assessments must be interpreted cautiously, particularly in cases of complete heart block with WI pacing.
