Annals of Nuclear Medicine

, Volume 33, Issue 12, pp 899–906 | Cite as

The evaluation of left ventricular dyssynchrony in hypertensive patients with a preserved systolic function undergoing gated SPECT myocardial perfusion imaging

  • Maryam AlvandiEmail author
  • Zahra Shaghaghi
  • Vahid Aryafar
  • Farnaz Fariba
  • Zahra Sanaei
Original Article



Hypertension as a known risk factor for cardiovascular diseases can result in left ventricular dyssynchrony (LVD) leading to uncoordinated contraction. The aim of our study was to evaluate whether systolic mechanical dyssynchrony measured by phase analysis of gated single-photon emission computed tomography (SPECT) imaging occurs in hypertensive patients with a low risk for coronary artery disease and a normal ejection fraction and its possible relationships with severity of hypertension and the influence of antihypertensive treatments.


A total of 466 patients (328 females and 138 males, with a mean age of 59.62 ± 10.27 years) who had a low risk factor for coronary artery disease, a normal perfusion study and, a normal ejection fraction were included of which 408 was hypertensive and 58 normotensive. Phase analysis parameters (derived using QGS software) were compared in patients with and without hypertension. Using different statistical methods, relationship between derived phase analysis indices (PSD, PHB) for LVD and amount of blood pressure and antihypertensive drugs consumption were evaluated.


The prevalence of LVD in patients with hypertension was 63.2% (n = 258), while it was 6.9% in the normotensive group. The mean values of PSD and PHB were higher in hypertensive patients than normotensive ones (12.55 vs. 5.8 and 39.24 vs. 21.12), respectively, so that, statistically significant differences were found between the patients with and without hypertension (p < 0.001). Furthermore, there was a clear relationship between the severity of hypertension and the degree of LVD: by increasing 1 mmHg in systolic and diastolic blood pressure, PSD and PHB increase by (0.034, 0.108 and 0.035, 0.0311), respectively. The statistical results showed that the frequency of LVD in controlled hypertensive patients taking antihypertensive drugs was 55.2%, which significantly lower compared to the patient suffering from hypertension without taking any hypertensive drug (81.35%, p < 0.001).


Our study findings are in favor of using phase analysis-gated SPECT imaging as a routine way for detection of LVD—known indicator of progression toward systolic dysfunction in the future—in hypertensive patients with a low risk for coronary artery diseases and a normal cardiac systolic function.


Phase analysis LV dyssynchrony Gated SPECT MPI Hypertension 



We would like to thank the Clinical Research Development Unit of Farshchian Heart Center, Hamadan University of Medical Science for helpful support to our experiment. We are also immensely grateful to Afshin Rezapour for careful editing the manuscript.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflicts of interest and no funding was received for this study.


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Copyright information

© The Japanese Society of Nuclear Medicine 2019

Authors and Affiliations

  1. 1.Department of Nuclear Medicine and Molecular Imaging, Clinical Development Research Unit of Farshchian Heart CenterHamadan University of Medical SciencesHamadanIran
  2. 2.Department of Cardiology, School of MedicineHamadan University of Medical SciencesHamadanIran
  3. 3.Department of Community MedicineEducation Development Office, Hamadan University of Medical SciencesHamadanIran

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