Continuous thermodilution to assess absolute flow and microvascular resistance: validation in humans using [15O]H2O positron emission tomography

Henk Everaars, Guus A. de Waard, Stefan P. Schumacher, Frederik M. Zimmermann, Michiel J. Bom, Peter M. van de Ven, Pieter G. Raijmakers, Adriaan A. Lammertsma, Marco J. Götte, Albert C. van Rossum, Akira Kurata, Koen M.J. Marques, Nico H.J. Pijls, Niels van Royen, Paul Knaapen (Corresponding author)

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Abstract

Aims: Continuous thermodilution is a novel technique to quantify absolute coronary flow and microvascular resistance (MVR). Notably, intracoronary infusion of saline elicits maximal hyperaemia, obviating the need for adenosine. The primary aim of this study was to validate continuous thermodilution in humans by comparing invasive measurements to [15O]H2O positron emission tomography (PET). As a secondary goal, absolute flow and MVR were compared between invasive measurements obtained with and without adenosine. Methods and results: Twenty-five patients underwent coronary computed tomography angiography (CCTA), [15O]H2O PET, and invasive assessment. Absolute coronary flow and MVR were measured in the left anterior descending and left circumflex artery using a dedicated infusion catheter and a temperature/pressure sensor-Tipped guidewire. Invasive measurements were performed with and without adenosine. In order to compare invasive flow measurements with PET perfusion, subtending myocardial mass of the investigated vessels was derived from CCTA using the Voronoi algorithm. Invasive and non-invasive measurements of adenosine-induced hyperaemic flow and MVR showed strong correlation (r = 0.91; P < 0.001 for flow and r = 0.85; P < 0.001 for MVR) and good agreement [intraclass correlation coefficient (ICC) = 0.90; P < 0.001 for flow and ICC = 0.79; P < 0.001 for MVR]. Absolute flow and MVR also correlated well between measurements with and without adenosine (r = 0.97; P < 0.001 for flow and r = 0.98; P < 0.001 for MVR) and showed good agreement (ICC = 0.96; P < 0.001 for flow and ICC = 0.98; P < 0.001 for MVR). Conclusions: Continuous thermodilution is an accurate method to measure absolute coronary flow and MVR, which is evidenced by strong agreement with [15O]H2O PET derived flow and resistance. Absolute flow and MVR correlate highly between invasive measurements obtained with and without adenosine, which confirms that intracoronary infusion of room temperature saline elicits steady-state maximal hyperaemia.

Original languageEnglish
Pages (from-to)2350-2359
Number of pages10
JournalEuropean Heart Journal
Volume40
Issue number28
DOIs
Publication statusPublished - 21 Jul 2019

Fingerprint

Thermodilution
Positron-Emission Tomography
Adenosine
Hyperemia
Temperature
Catheters
Arteries
Perfusion
Pressure

Keywords

  • Absolute coronary flow
  • Microcirculation
  • Microvascular resistance
  • Positron emission tomography
  • Thermodilution

Cite this

Everaars, H., de Waard, G. A., Schumacher, S. P., Zimmermann, F. M., Bom, M. J., van de Ven, P. M., ... Knaapen, P. (2019). Continuous thermodilution to assess absolute flow and microvascular resistance: validation in humans using [15O]H2O positron emission tomography. European Heart Journal, 40(28), 2350-2359. https://doi.org/10.1093/eurheartj/ehz245
Everaars, Henk ; de Waard, Guus A. ; Schumacher, Stefan P. ; Zimmermann, Frederik M. ; Bom, Michiel J. ; van de Ven, Peter M. ; Raijmakers, Pieter G. ; Lammertsma, Adriaan A. ; Götte, Marco J. ; van Rossum, Albert C. ; Kurata, Akira ; Marques, Koen M.J. ; Pijls, Nico H.J. ; van Royen, Niels ; Knaapen, Paul. / Continuous thermodilution to assess absolute flow and microvascular resistance : validation in humans using [15O]H2O positron emission tomography. In: European Heart Journal. 2019 ; Vol. 40, No. 28. pp. 2350-2359.
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title = "Continuous thermodilution to assess absolute flow and microvascular resistance: validation in humans using [15O]H2O positron emission tomography",
abstract = "Aims: Continuous thermodilution is a novel technique to quantify absolute coronary flow and microvascular resistance (MVR). Notably, intracoronary infusion of saline elicits maximal hyperaemia, obviating the need for adenosine. The primary aim of this study was to validate continuous thermodilution in humans by comparing invasive measurements to [15O]H2O positron emission tomography (PET). As a secondary goal, absolute flow and MVR were compared between invasive measurements obtained with and without adenosine. Methods and results: Twenty-five patients underwent coronary computed tomography angiography (CCTA), [15O]H2O PET, and invasive assessment. Absolute coronary flow and MVR were measured in the left anterior descending and left circumflex artery using a dedicated infusion catheter and a temperature/pressure sensor-Tipped guidewire. Invasive measurements were performed with and without adenosine. In order to compare invasive flow measurements with PET perfusion, subtending myocardial mass of the investigated vessels was derived from CCTA using the Voronoi algorithm. Invasive and non-invasive measurements of adenosine-induced hyperaemic flow and MVR showed strong correlation (r = 0.91; P < 0.001 for flow and r = 0.85; P < 0.001 for MVR) and good agreement [intraclass correlation coefficient (ICC) = 0.90; P < 0.001 for flow and ICC = 0.79; P < 0.001 for MVR]. Absolute flow and MVR also correlated well between measurements with and without adenosine (r = 0.97; P < 0.001 for flow and r = 0.98; P < 0.001 for MVR) and showed good agreement (ICC = 0.96; P < 0.001 for flow and ICC = 0.98; P < 0.001 for MVR). Conclusions: Continuous thermodilution is an accurate method to measure absolute coronary flow and MVR, which is evidenced by strong agreement with [15O]H2O PET derived flow and resistance. Absolute flow and MVR correlate highly between invasive measurements obtained with and without adenosine, which confirms that intracoronary infusion of room temperature saline elicits steady-state maximal hyperaemia.",
keywords = "Absolute coronary flow, Microcirculation, Microvascular resistance, Positron emission tomography, Thermodilution",
author = "Henk Everaars and {de Waard}, {Guus A.} and Schumacher, {Stefan P.} and Zimmermann, {Frederik M.} and Bom, {Michiel J.} and {van de Ven}, {Peter M.} and Raijmakers, {Pieter G.} and Lammertsma, {Adriaan A.} and G{\"o}tte, {Marco J.} and {van Rossum}, {Albert C.} and Akira Kurata and Marques, {Koen M.J.} and Pijls, {Nico H.J.} and {van Royen}, Niels and Paul Knaapen",
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Everaars, H, de Waard, GA, Schumacher, SP, Zimmermann, FM, Bom, MJ, van de Ven, PM, Raijmakers, PG, Lammertsma, AA, Götte, MJ, van Rossum, AC, Kurata, A, Marques, KMJ, Pijls, NHJ, van Royen, N & Knaapen, P 2019, 'Continuous thermodilution to assess absolute flow and microvascular resistance: validation in humans using [15O]H2O positron emission tomography', European Heart Journal, vol. 40, no. 28, pp. 2350-2359. https://doi.org/10.1093/eurheartj/ehz245

Continuous thermodilution to assess absolute flow and microvascular resistance : validation in humans using [15O]H2O positron emission tomography. / Everaars, Henk; de Waard, Guus A.; Schumacher, Stefan P.; Zimmermann, Frederik M.; Bom, Michiel J.; van de Ven, Peter M.; Raijmakers, Pieter G.; Lammertsma, Adriaan A.; Götte, Marco J.; van Rossum, Albert C.; Kurata, Akira; Marques, Koen M.J.; Pijls, Nico H.J.; van Royen, Niels; Knaapen, Paul (Corresponding author).

In: European Heart Journal, Vol. 40, No. 28, 21.07.2019, p. 2350-2359.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Continuous thermodilution to assess absolute flow and microvascular resistance

T2 - validation in humans using [15O]H2O positron emission tomography

AU - Everaars, Henk

AU - de Waard, Guus A.

AU - Schumacher, Stefan P.

AU - Zimmermann, Frederik M.

AU - Bom, Michiel J.

AU - van de Ven, Peter M.

AU - Raijmakers, Pieter G.

AU - Lammertsma, Adriaan A.

AU - Götte, Marco J.

AU - van Rossum, Albert C.

AU - Kurata, Akira

AU - Marques, Koen M.J.

AU - Pijls, Nico H.J.

AU - van Royen, Niels

AU - Knaapen, Paul

PY - 2019/7/21

Y1 - 2019/7/21

N2 - Aims: Continuous thermodilution is a novel technique to quantify absolute coronary flow and microvascular resistance (MVR). Notably, intracoronary infusion of saline elicits maximal hyperaemia, obviating the need for adenosine. The primary aim of this study was to validate continuous thermodilution in humans by comparing invasive measurements to [15O]H2O positron emission tomography (PET). As a secondary goal, absolute flow and MVR were compared between invasive measurements obtained with and without adenosine. Methods and results: Twenty-five patients underwent coronary computed tomography angiography (CCTA), [15O]H2O PET, and invasive assessment. Absolute coronary flow and MVR were measured in the left anterior descending and left circumflex artery using a dedicated infusion catheter and a temperature/pressure sensor-Tipped guidewire. Invasive measurements were performed with and without adenosine. In order to compare invasive flow measurements with PET perfusion, subtending myocardial mass of the investigated vessels was derived from CCTA using the Voronoi algorithm. Invasive and non-invasive measurements of adenosine-induced hyperaemic flow and MVR showed strong correlation (r = 0.91; P < 0.001 for flow and r = 0.85; P < 0.001 for MVR) and good agreement [intraclass correlation coefficient (ICC) = 0.90; P < 0.001 for flow and ICC = 0.79; P < 0.001 for MVR]. Absolute flow and MVR also correlated well between measurements with and without adenosine (r = 0.97; P < 0.001 for flow and r = 0.98; P < 0.001 for MVR) and showed good agreement (ICC = 0.96; P < 0.001 for flow and ICC = 0.98; P < 0.001 for MVR). Conclusions: Continuous thermodilution is an accurate method to measure absolute coronary flow and MVR, which is evidenced by strong agreement with [15O]H2O PET derived flow and resistance. Absolute flow and MVR correlate highly between invasive measurements obtained with and without adenosine, which confirms that intracoronary infusion of room temperature saline elicits steady-state maximal hyperaemia.

AB - Aims: Continuous thermodilution is a novel technique to quantify absolute coronary flow and microvascular resistance (MVR). Notably, intracoronary infusion of saline elicits maximal hyperaemia, obviating the need for adenosine. The primary aim of this study was to validate continuous thermodilution in humans by comparing invasive measurements to [15O]H2O positron emission tomography (PET). As a secondary goal, absolute flow and MVR were compared between invasive measurements obtained with and without adenosine. Methods and results: Twenty-five patients underwent coronary computed tomography angiography (CCTA), [15O]H2O PET, and invasive assessment. Absolute coronary flow and MVR were measured in the left anterior descending and left circumflex artery using a dedicated infusion catheter and a temperature/pressure sensor-Tipped guidewire. Invasive measurements were performed with and without adenosine. In order to compare invasive flow measurements with PET perfusion, subtending myocardial mass of the investigated vessels was derived from CCTA using the Voronoi algorithm. Invasive and non-invasive measurements of adenosine-induced hyperaemic flow and MVR showed strong correlation (r = 0.91; P < 0.001 for flow and r = 0.85; P < 0.001 for MVR) and good agreement [intraclass correlation coefficient (ICC) = 0.90; P < 0.001 for flow and ICC = 0.79; P < 0.001 for MVR]. Absolute flow and MVR also correlated well between measurements with and without adenosine (r = 0.97; P < 0.001 for flow and r = 0.98; P < 0.001 for MVR) and showed good agreement (ICC = 0.96; P < 0.001 for flow and ICC = 0.98; P < 0.001 for MVR). Conclusions: Continuous thermodilution is an accurate method to measure absolute coronary flow and MVR, which is evidenced by strong agreement with [15O]H2O PET derived flow and resistance. Absolute flow and MVR correlate highly between invasive measurements obtained with and without adenosine, which confirms that intracoronary infusion of room temperature saline elicits steady-state maximal hyperaemia.

KW - Absolute coronary flow

KW - Microcirculation

KW - Microvascular resistance

KW - Positron emission tomography

KW - Thermodilution

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DO - 10.1093/eurheartj/ehz245

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