Left ventricular mass index measured by quantitative gated myocardial SPECT with 99mTc-tetrofosmin: A comparison with echocardiography

Kaoru Maruyama, Shinji Hasegawa, Daisaku Nakatani, Asit Kr Paul, Hideo Kusuoka, Tsunehiko Nishimura, Masatsugu Hori, Jun Hatazawa

Research output: Contribution to journalArticle

Abstract

Objective: Left ventricular mass is an important determinant of diagnosis and prognosis in patients with heart disease. The aim of the present study was to validate measurement of the left ventricular mass index (LVMI) by quantitative gated myocardial SPECT (QGS) with 99mTc-tetrofosmin by comparing it with echocardiography. Methods: QGS and M-mode echocardiography (Echo) were performed within one month of each other in 179 patients. M-mode echocardiography was carried out according to Devereux's method. QGS images were acquired one hour after injection of 99mTc-tetrofosmin at rest. Myocardial volume was defined as the volume between the endocardial and epicardial surface in the end-diastolic phase. LVMI (g/m2) was defined as myocardial volume divided by myocardial specific density and corrected for body surface area. QGS LVMI measurements were performed twice by the same observer and independently by two different observers. Regional hypoperfusion in the group of patients with old myocardial infarction (n = 26) was evaluated semiquantitatively on the basis of the total defect score on the resting 99mTc-tetrofosmin SPECT images. Results: Among the patients as a whole QGS LVMI was significantly correlated with Echo LVMI (r = 0.96, p <0.001). Intra-observer and inter-observer analyses showed significant reproducibility (r = 0.99 and r = 0.98, respectively, p <0.001). In the patients with old myocardial infarction, but QGS LVMI was significantly lower than Echo LVMI (p <0.001), and the magnitude of the underestimation was closely related to the severity of the perfusion defect on the resting SPECT images. Conclusions: Measurements of LVMI by 99mTc-tetrofosmin QGS are reproducible and consistent with echocardiograpic estimates. Underestimation in patients with severe perfusion defects must be taken into consideration.

Original languageEnglish (US)
Pages (from-to)31-39
Number of pages9
JournalAnnals of Nuclear Medicine
Volume17
Issue number1
StatePublished - Feb 2003
Externally publishedYes

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Single-Photon Emission-Computed Tomography
Echocardiography
Perfusion
Myocardial Infarction
technetium Tc 99m 1,2-bis(bis(2-ethoxyethyl)phosphino)ethane
Body Surface Area
Heart Diseases
Injections

Keywords

  • Tc-tetrofosmin
  • Left ventricular mass
  • M-mode echocardiography
  • Perfusion
  • Quantitative gated myocardial SPECT

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

Cite this

Maruyama, K., Hasegawa, S., Nakatani, D., Paul, A. K., Kusuoka, H., Nishimura, T., ... Hatazawa, J. (2003). Left ventricular mass index measured by quantitative gated myocardial SPECT with 99mTc-tetrofosmin: A comparison with echocardiography. Annals of Nuclear Medicine, 17(1), 31-39.

Left ventricular mass index measured by quantitative gated myocardial SPECT with 99mTc-tetrofosmin : A comparison with echocardiography. / Maruyama, Kaoru; Hasegawa, Shinji; Nakatani, Daisaku; Paul, Asit Kr; Kusuoka, Hideo; Nishimura, Tsunehiko; Hori, Masatsugu; Hatazawa, Jun.

In: Annals of Nuclear Medicine, Vol. 17, No. 1, 02.2003, p. 31-39.

Research output: Contribution to journalArticle

Maruyama, K, Hasegawa, S, Nakatani, D, Paul, AK, Kusuoka, H, Nishimura, T, Hori, M & Hatazawa, J 2003, 'Left ventricular mass index measured by quantitative gated myocardial SPECT with 99mTc-tetrofosmin: A comparison with echocardiography', Annals of Nuclear Medicine, vol. 17, no. 1, pp. 31-39.
Maruyama, Kaoru ; Hasegawa, Shinji ; Nakatani, Daisaku ; Paul, Asit Kr ; Kusuoka, Hideo ; Nishimura, Tsunehiko ; Hori, Masatsugu ; Hatazawa, Jun. / Left ventricular mass index measured by quantitative gated myocardial SPECT with 99mTc-tetrofosmin : A comparison with echocardiography. In: Annals of Nuclear Medicine. 2003 ; Vol. 17, No. 1. pp. 31-39.
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abstract = "Objective: Left ventricular mass is an important determinant of diagnosis and prognosis in patients with heart disease. The aim of the present study was to validate measurement of the left ventricular mass index (LVMI) by quantitative gated myocardial SPECT (QGS) with 99mTc-tetrofosmin by comparing it with echocardiography. Methods: QGS and M-mode echocardiography (Echo) were performed within one month of each other in 179 patients. M-mode echocardiography was carried out according to Devereux's method. QGS images were acquired one hour after injection of 99mTc-tetrofosmin at rest. Myocardial volume was defined as the volume between the endocardial and epicardial surface in the end-diastolic phase. LVMI (g/m2) was defined as myocardial volume divided by myocardial specific density and corrected for body surface area. QGS LVMI measurements were performed twice by the same observer and independently by two different observers. Regional hypoperfusion in the group of patients with old myocardial infarction (n = 26) was evaluated semiquantitatively on the basis of the total defect score on the resting 99mTc-tetrofosmin SPECT images. Results: Among the patients as a whole QGS LVMI was significantly correlated with Echo LVMI (r = 0.96, p <0.001). Intra-observer and inter-observer analyses showed significant reproducibility (r = 0.99 and r = 0.98, respectively, p <0.001). In the patients with old myocardial infarction, but QGS LVMI was significantly lower than Echo LVMI (p <0.001), and the magnitude of the underestimation was closely related to the severity of the perfusion defect on the resting SPECT images. Conclusions: Measurements of LVMI by 99mTc-tetrofosmin QGS are reproducible and consistent with echocardiograpic estimates. Underestimation in patients with severe perfusion defects must be taken into consideration.",
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T2 - A comparison with echocardiography

AU - Maruyama, Kaoru

AU - Hasegawa, Shinji

AU - Nakatani, Daisaku

AU - Paul, Asit Kr

AU - Kusuoka, Hideo

AU - Nishimura, Tsunehiko

AU - Hori, Masatsugu

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N2 - Objective: Left ventricular mass is an important determinant of diagnosis and prognosis in patients with heart disease. The aim of the present study was to validate measurement of the left ventricular mass index (LVMI) by quantitative gated myocardial SPECT (QGS) with 99mTc-tetrofosmin by comparing it with echocardiography. Methods: QGS and M-mode echocardiography (Echo) were performed within one month of each other in 179 patients. M-mode echocardiography was carried out according to Devereux's method. QGS images were acquired one hour after injection of 99mTc-tetrofosmin at rest. Myocardial volume was defined as the volume between the endocardial and epicardial surface in the end-diastolic phase. LVMI (g/m2) was defined as myocardial volume divided by myocardial specific density and corrected for body surface area. QGS LVMI measurements were performed twice by the same observer and independently by two different observers. Regional hypoperfusion in the group of patients with old myocardial infarction (n = 26) was evaluated semiquantitatively on the basis of the total defect score on the resting 99mTc-tetrofosmin SPECT images. Results: Among the patients as a whole QGS LVMI was significantly correlated with Echo LVMI (r = 0.96, p <0.001). Intra-observer and inter-observer analyses showed significant reproducibility (r = 0.99 and r = 0.98, respectively, p <0.001). In the patients with old myocardial infarction, but QGS LVMI was significantly lower than Echo LVMI (p <0.001), and the magnitude of the underestimation was closely related to the severity of the perfusion defect on the resting SPECT images. Conclusions: Measurements of LVMI by 99mTc-tetrofosmin QGS are reproducible and consistent with echocardiograpic estimates. Underestimation in patients with severe perfusion defects must be taken into consideration.

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KW - M-mode echocardiography

KW - Perfusion

KW - Quantitative gated myocardial SPECT

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