The Experts below are selected from a list of 181323 Experts worldwide ranked by ideXlab platform
John H Laragh - One of the best experts on this subject based on the ideXlab platform.
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effective plasma renin activity a Derived Measure for assessing residual plasma renin activity in patients taking angiotensin converting enzyme inhibitors or angiotensin receptor blockers
Hypertension, 2010Co-Authors: Jean E Sealey, David Parra, Robert S Rosenstein, John H LaraghAbstract:To the Editor: The plasma renin activity (PRA) test quantifies the circulating activity of the renin-angiotensin system by measuring the rate at which renin forms angiotensin I (Ang I) in plasma. The PRA test overestimates the true activity of the circulating renin-angiotensin system in patients taking angiotensin-converting enzyme inhibitors (ACEIs) or angiotensin receptor blockers (ARBs) because these drugs block the system at sites distal to the enzymatic release of Ang I by plasma renin.1,2 When patients are taking these drugs, a simple calculation can be used to determine …
Jean E Sealey - One of the best experts on this subject based on the ideXlab platform.
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effective plasma renin activity a Derived Measure for assessing residual plasma renin activity in patients taking angiotensin converting enzyme inhibitors or angiotensin receptor blockers
Hypertension, 2010Co-Authors: Jean E Sealey, David Parra, Robert S Rosenstein, John H LaraghAbstract:To the Editor: The plasma renin activity (PRA) test quantifies the circulating activity of the renin-angiotensin system by measuring the rate at which renin forms angiotensin I (Ang I) in plasma. The PRA test overestimates the true activity of the circulating renin-angiotensin system in patients taking angiotensin-converting enzyme inhibitors (ACEIs) or angiotensin receptor blockers (ARBs) because these drugs block the system at sites distal to the enzymatic release of Ang I by plasma renin.1,2 When patients are taking these drugs, a simple calculation can be used to determine …
David A Calhoun - One of the best experts on this subject based on the ideXlab platform.
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response to effective plasma renin activity a Derived Measure for assessing residual plasma renin activity in patients taking angiotensin converting enzyme inhibitors or angiotensin receptor blockers
Hypertension, 2010Co-Authors: Eduardo Pimenta, David A CalhounAbstract:We thank Sealey et al1 for their interest in our article and their comments. They point out that plasma renin activity (PRA) in our study likely overestimated the true activity of circulating PRA and, by calculating the effective PRA, our results would be predictable. Suppressed PRA is a marker of volume overload and can occur with high dietary salt ingestion. Theoretically, patients with suppressed PRA might achieve greater blood pressure (BP) reductions with a low-salt diet than patients with high PRA because of greater salt sensitivity. Some …
Yuhei Kobayashi - One of the best experts on this subject based on the ideXlab platform.
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invasive assessment of the coronary microvasculature the index of microcirculatory resistance
Circulation-cardiovascular Interventions, 2017Co-Authors: William F Fearon, Yuhei KobayashiAbstract:Traditionally, invasive coronary physiological assessment has focused on the epicardial coronary artery. More recently, appreciation of the importance of the coronary microvasculature in determining patient outcomes has grown. Several invasive modalities for interrogating microvascular function have been proposed. Angiographic techniques have been limited by their qualitative and subjective nature. Doppler wire-Derived coronary flow reserve has been applied in research studies, but its clinical role has been limited by its lack of reproducibility, its lack of a clear normal value, and the fact that it is not specific for the microvasculature but interrogates the entire coronary circulation. The index of microcirculatory resistance—a thermodilution-Derived Measure of the minimum achievable microvascular resistance—is relatively easy to Measure, more reproducible, has a clearer normal value, and is independent of epicardial coronary artery stenosis. The index of microcirculatory resistance has been shown to have prognostic value in patients with ST-segment–elevation myocardial infarction and cardiac allograft vasculopathy after heart transplantation. Emerging data demonstrate its role in evaluating patients with chest pain and nonobstructive coronary artery disease. Increasingly, the index of microcirculatory resistance is used as a reference standard for invasively assessing the microvasculature in clinical trials.
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invasive assessment of the coronary microvasculature the index of microcirculatory resistance
Circulation-cardiovascular Interventions, 2017Co-Authors: William F Fearon, Yuhei KobayashiAbstract:Traditionally, invasive coronary physiological assessment has focused on the epicardial coronary artery. More recently, appreciation of the importance of the coronary microvasculature in determining patient outcomes has grown. Several invasive modalities for interrogating microvascular function have been proposed. Angiographic techniques have been limited by their qualitative and subjective nature. Doppler wire-Derived coronary flow reserve has been applied in research studies, but its clinical role has been limited by its lack of reproducibility, its lack of a clear normal value, and the fact that it is not specific for the microvasculature but interrogates the entire coronary circulation. The index of microcirculatory resistance-a thermodilution-Derived Measure of the minimum achievable microvascular resistance-is relatively easy to Measure, more reproducible, has a clearer normal value, and is independent of epicardial coronary artery stenosis. The index of microcirculatory resistance has been shown to have prognostic value in patients with ST-segment-elevation myocardial infarction and cardiac allograft vasculopathy after heart transplantation. Emerging data demonstrate its role in evaluating patients with chest pain and nonobstructive coronary artery disease. Increasingly, the index of microcirculatory resistance is used as a reference standard for invasively assessing the microvasculature in clinical trials.
Robert S Rosenstein - One of the best experts on this subject based on the ideXlab platform.
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effective plasma renin activity a Derived Measure for assessing residual plasma renin activity in patients taking angiotensin converting enzyme inhibitors or angiotensin receptor blockers
Hypertension, 2010Co-Authors: Jean E Sealey, David Parra, Robert S Rosenstein, John H LaraghAbstract:To the Editor: The plasma renin activity (PRA) test quantifies the circulating activity of the renin-angiotensin system by measuring the rate at which renin forms angiotensin I (Ang I) in plasma. The PRA test overestimates the true activity of the circulating renin-angiotensin system in patients taking angiotensin-converting enzyme inhibitors (ACEIs) or angiotensin receptor blockers (ARBs) because these drugs block the system at sites distal to the enzymatic release of Ang I by plasma renin.1,2 When patients are taking these drugs, a simple calculation can be used to determine …