Risk stratification and prognostic assessment by myocardial perfusion-gated SPECT in patients with left bundle-branch block and low-intermediate cardiac risk

Objective In high-risk patients with left bundle-branch block (LBBB), functional but not perfusion parameters yield incremental prognostic information. The aim of our study was to evaluate the prognostic value of gated single photon emission computed tomography (SPECT) in low-intermediate risk LBBB...

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Veröffentlicht in:Annals of nuclear medicine 2012-08, Vol.26 (7), p.559-570
Hauptverfasser: Fovino, Luca Nai, Saladini, Giorgio, Mormino, Gino Paolo, Saladini, Francesca, Razzolini, Renato, Evangelista, Laura
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container_title Annals of nuclear medicine
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creator Fovino, Luca Nai
Saladini, Giorgio
Mormino, Gino Paolo
Saladini, Francesca
Razzolini, Renato
Evangelista, Laura
description Objective In high-risk patients with left bundle-branch block (LBBB), functional but not perfusion parameters yield incremental prognostic information. The aim of our study was to evaluate the prognostic value of gated single photon emission computed tomography (SPECT) in low-intermediate risk LBBB patients. Methods One hundred seventy-six subjects underwent stress-rest dual-day protocol 99mTc sestamibi-gated SPECT and were dichotomized in two groups: without LBBB (Group 1, n  = 86) and with LBBB (Group 2, n  = 90). Patients were followed for 32 ± 18 months. Cox regression multivariate analysis was used to determine which variable was the best predictor of cardiac event. Event-free survival curves were computed by Kaplan–Meier method. Results Myocardial perfusion scintigraphy was abnormal in 32 and 60 patients for Groups 1 and 2, respectively (37 vs. 67 %, p  
doi_str_mv 10.1007/s12149-012-0613-4
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The aim of our study was to evaluate the prognostic value of gated single photon emission computed tomography (SPECT) in low-intermediate risk LBBB patients. Methods One hundred seventy-six subjects underwent stress-rest dual-day protocol 99mTc sestamibi-gated SPECT and were dichotomized in two groups: without LBBB (Group 1, n  = 86) and with LBBB (Group 2, n  = 90). Patients were followed for 32 ± 18 months. Cox regression multivariate analysis was used to determine which variable was the best predictor of cardiac event. Event-free survival curves were computed by Kaplan–Meier method. Results Myocardial perfusion scintigraphy was abnormal in 32 and 60 patients for Groups 1 and 2, respectively (37 vs. 67 %, p  &lt; 0.001). In Groups 1 and 2, the mean summed stress score (SSS) was 3.7 ± 5.6 versus 6.7 ± 6.4, while the mean summed difference score (SDS) was 1.6 ± 2.5 versus 2.7 ± 3.3 (both p  &lt; 0.005); therefore 34 % of patients in Group 1 and 53 % of those in Group 2 presented myocardial ischemia. All functional parameters were significantly different between the two subsets (all p  &lt; 0.005). Follow-up was completed in 161 patients (92 %); 10 events occurred in Group 1 and 20 in Group 2 (14 vs. 25 %). The event-free survival was significantly higher in patients with normal than in those with abnormal scan (85 vs. 63 %, p  &lt; 0.005); moreover, the prognosis of patients with LBBB was significantly worse. At multivariate analysis, SDS was found to be the only independent predictor of cardiac events both in all patients and in LBBB population (HR 3.08, and HR 4.99, p  &lt; 0.05). Conclusions This is the first study to assess the prognostic value of gated SPECT in patients with LBBB and low-intermediate cardiac risk. Both perfusion and functional data obtained by gated SPECT are different between patients with and without LBBB. However, SDS is the only predictor of events. Thus, the amount of reversible ischemia at gated SPECT has a discriminative power in stratifying the cardiac risk of LBBB population.</description><identifier>ISSN: 0914-7187</identifier><identifier>EISSN: 1864-6433</identifier><identifier>DOI: 10.1007/s12149-012-0613-4</identifier><identifier>PMID: 22660970</identifier><language>eng</language><publisher>Japan: Springer Japan</publisher><subject>Aged ; Bundle-Branch Block - diagnostic imaging ; Bundle-Branch Block - physiopathology ; Cardiac-Gated Single-Photon Emission Computer-Assisted Tomography ; Computed tomography ; Data processing ; Emissions ; Female ; Heart ; Humans ; Imaging ; Ischemia ; Male ; Medicine ; Medicine &amp; Public Health ; Middle Aged ; Multivariate analysis ; Myocardial ischemia ; Myocardial Perfusion Imaging ; Nuclear Medicine ; Original Article ; Perfusion ; Prognosis ; Radiology ; Regional Blood Flow ; Retrospective Studies ; Risk Assessment ; Risk factors ; Risk groups ; Scintigraphy ; Single photon emission computed tomography ; Sodium lauryl sulfate ; Stratification ; Stress ; Survival</subject><ispartof>Annals of nuclear medicine, 2012-08, Vol.26 (7), p.559-570</ispartof><rights>The Japanese Society of Nuclear Medicine 2012</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c458t-d5b088e631876a590db52d1230ad9c4e279c86624693c62cb69bf6e8d55b35f53</citedby><cites>FETCH-LOGICAL-c458t-d5b088e631876a590db52d1230ad9c4e279c86624693c62cb69bf6e8d55b35f53</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s12149-012-0613-4$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s12149-012-0613-4$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,27901,27902,41464,42533,51294</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/22660970$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Fovino, Luca Nai</creatorcontrib><creatorcontrib>Saladini, Giorgio</creatorcontrib><creatorcontrib>Mormino, Gino Paolo</creatorcontrib><creatorcontrib>Saladini, Francesca</creatorcontrib><creatorcontrib>Razzolini, Renato</creatorcontrib><creatorcontrib>Evangelista, Laura</creatorcontrib><title>Risk stratification and prognostic assessment by myocardial perfusion-gated SPECT in patients with left bundle-branch block and low-intermediate cardiac risk</title><title>Annals of nuclear medicine</title><addtitle>Ann Nucl Med</addtitle><addtitle>Ann Nucl Med</addtitle><description>Objective In high-risk patients with left bundle-branch block (LBBB), functional but not perfusion parameters yield incremental prognostic information. The aim of our study was to evaluate the prognostic value of gated single photon emission computed tomography (SPECT) in low-intermediate risk LBBB patients. Methods One hundred seventy-six subjects underwent stress-rest dual-day protocol 99mTc sestamibi-gated SPECT and were dichotomized in two groups: without LBBB (Group 1, n  = 86) and with LBBB (Group 2, n  = 90). Patients were followed for 32 ± 18 months. Cox regression multivariate analysis was used to determine which variable was the best predictor of cardiac event. Event-free survival curves were computed by Kaplan–Meier method. Results Myocardial perfusion scintigraphy was abnormal in 32 and 60 patients for Groups 1 and 2, respectively (37 vs. 67 %, p  &lt; 0.001). In Groups 1 and 2, the mean summed stress score (SSS) was 3.7 ± 5.6 versus 6.7 ± 6.4, while the mean summed difference score (SDS) was 1.6 ± 2.5 versus 2.7 ± 3.3 (both p  &lt; 0.005); therefore 34 % of patients in Group 1 and 53 % of those in Group 2 presented myocardial ischemia. All functional parameters were significantly different between the two subsets (all p  &lt; 0.005). Follow-up was completed in 161 patients (92 %); 10 events occurred in Group 1 and 20 in Group 2 (14 vs. 25 %). The event-free survival was significantly higher in patients with normal than in those with abnormal scan (85 vs. 63 %, p  &lt; 0.005); moreover, the prognosis of patients with LBBB was significantly worse. At multivariate analysis, SDS was found to be the only independent predictor of cardiac events both in all patients and in LBBB population (HR 3.08, and HR 4.99, p  &lt; 0.05). Conclusions This is the first study to assess the prognostic value of gated SPECT in patients with LBBB and low-intermediate cardiac risk. Both perfusion and functional data obtained by gated SPECT are different between patients with and without LBBB. However, SDS is the only predictor of events. 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The aim of our study was to evaluate the prognostic value of gated single photon emission computed tomography (SPECT) in low-intermediate risk LBBB patients. Methods One hundred seventy-six subjects underwent stress-rest dual-day protocol 99mTc sestamibi-gated SPECT and were dichotomized in two groups: without LBBB (Group 1, n  = 86) and with LBBB (Group 2, n  = 90). Patients were followed for 32 ± 18 months. Cox regression multivariate analysis was used to determine which variable was the best predictor of cardiac event. Event-free survival curves were computed by Kaplan–Meier method. Results Myocardial perfusion scintigraphy was abnormal in 32 and 60 patients for Groups 1 and 2, respectively (37 vs. 67 %, p  &lt; 0.001). In Groups 1 and 2, the mean summed stress score (SSS) was 3.7 ± 5.6 versus 6.7 ± 6.4, while the mean summed difference score (SDS) was 1.6 ± 2.5 versus 2.7 ± 3.3 (both p  &lt; 0.005); therefore 34 % of patients in Group 1 and 53 % of those in Group 2 presented myocardial ischemia. All functional parameters were significantly different between the two subsets (all p  &lt; 0.005). Follow-up was completed in 161 patients (92 %); 10 events occurred in Group 1 and 20 in Group 2 (14 vs. 25 %). The event-free survival was significantly higher in patients with normal than in those with abnormal scan (85 vs. 63 %, p  &lt; 0.005); moreover, the prognosis of patients with LBBB was significantly worse. At multivariate analysis, SDS was found to be the only independent predictor of cardiac events both in all patients and in LBBB population (HR 3.08, and HR 4.99, p  &lt; 0.05). Conclusions This is the first study to assess the prognostic value of gated SPECT in patients with LBBB and low-intermediate cardiac risk. Both perfusion and functional data obtained by gated SPECT are different between patients with and without LBBB. However, SDS is the only predictor of events. Thus, the amount of reversible ischemia at gated SPECT has a discriminative power in stratifying the cardiac risk of LBBB population.</abstract><cop>Japan</cop><pub>Springer Japan</pub><pmid>22660970</pmid><doi>10.1007/s12149-012-0613-4</doi><tpages>12</tpages></addata></record>
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subjects Aged
Bundle-Branch Block - diagnostic imaging
Bundle-Branch Block - physiopathology
Cardiac-Gated Single-Photon Emission Computer-Assisted Tomography
Computed tomography
Data processing
Emissions
Female
Heart
Humans
Imaging
Ischemia
Male
Medicine
Medicine & Public Health
Middle Aged
Multivariate analysis
Myocardial ischemia
Myocardial Perfusion Imaging
Nuclear Medicine
Original Article
Perfusion
Prognosis
Radiology
Regional Blood Flow
Retrospective Studies
Risk Assessment
Risk factors
Risk groups
Scintigraphy
Single photon emission computed tomography
Sodium lauryl sulfate
Stratification
Stress
Survival
title Risk stratification and prognostic assessment by myocardial perfusion-gated SPECT in patients with left bundle-branch block and low-intermediate cardiac risk
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