Background: Data derived from stress myocardial perfusion imaging(MPI) carry prognostic significance in young patients with hypertrophic cardiomyopathy(HCM), but there are limited data on the utility of stress MPI in ...Background: Data derived from stress myocardial perfusion imaging(MPI) carry prognostic significance in young patients with hypertrophic cardiomyopathy(HCM), but there are limited data on the utility of stress MPI in patients with HCM who are older. This study examined the prognostic significance of stress MPI in an adult population of patients with HCM. Methods: We examined 158 patients with HCM(aged 60± 16 years, 61% men) who underwent exercise or pharmacologic stress MPI. Summed stress score(SSS, normal=56) and summed reversibility scores were calculated for each patient. Follow- up was complete in 157(99% ) patients at a median duration of 5.2 years. Results: Normal single- photon emission computed tomography(SPECT) images were present in 38% of the population. Summed stress score(P=.01) and summed reversibility score(P=.03) were both significantly associated with cardiovascular death. Survival at 10 years was significantly better in those with normal versus abnormal SPECT(89% vs 67% , P= .04). Ten- year survival also was better in those without versus those with ischemia(90% vs 64% , P=.02). Five- year survival could be stratified by SSS risk categories: low risk(SSS ≥ 53), 97% ; intermediate risk(SSS=48- 52), 94% ; and high risk(SSS ≤ 47), 79% (P=.04). Bivariate models of SSS and other significant covariates supported an independent relation of SSS to cardiovascular death. Conclusions: In an older population of patients with HCM referred for SPECT imaging, abnormal stress MPI identifies those at increased risk of cardiovascular death.展开更多
目的通过观察缺血性脑卒中患者行肢体缺血后适应治疗前后脑血流灌注及葡萄糖代谢变化,了解单光子发射计算机断层摄影(SPECT)在肢体缺血后适应患者疗效评价中的价值。方法连续选择2009~2011年在北京宣武医院脑卒中治疗中心接受治疗的6...目的通过观察缺血性脑卒中患者行肢体缺血后适应治疗前后脑血流灌注及葡萄糖代谢变化,了解单光子发射计算机断层摄影(SPECT)在肢体缺血后适应患者疗效评价中的价值。方法连续选择2009~2011年在北京宣武医院脑卒中治疗中心接受治疗的67例脑卒中患者。入组患者被随机分为2组:后适应组43例和对照组24例,治疗前及治疗后6个月分别行SPECT检查。结果 2组患者治疗前脑血流灌注及脑葡萄糖代谢显像,患侧额、颞、顶、枕叶、基底节和丘脑病灶分布无统计学差异(P〉0.05)。后适应组患者基底节(0.97±0.10 vs 0.93±0.09,P=0.000)和丘脑(0.99±0.09 vs 0.95±0.09,P=0.003)治疗后放射性计数比值较治疗前明显升高(P〈0.05)。结论肢体缺血后适应治疗能改善缺血脑组织对缺血的耐受,通过SPECT检查发现经肢体缺血后适应治疗的患者基底节和丘脑血流灌注改善明显。展开更多
文摘Background: Data derived from stress myocardial perfusion imaging(MPI) carry prognostic significance in young patients with hypertrophic cardiomyopathy(HCM), but there are limited data on the utility of stress MPI in patients with HCM who are older. This study examined the prognostic significance of stress MPI in an adult population of patients with HCM. Methods: We examined 158 patients with HCM(aged 60± 16 years, 61% men) who underwent exercise or pharmacologic stress MPI. Summed stress score(SSS, normal=56) and summed reversibility scores were calculated for each patient. Follow- up was complete in 157(99% ) patients at a median duration of 5.2 years. Results: Normal single- photon emission computed tomography(SPECT) images were present in 38% of the population. Summed stress score(P=.01) and summed reversibility score(P=.03) were both significantly associated with cardiovascular death. Survival at 10 years was significantly better in those with normal versus abnormal SPECT(89% vs 67% , P= .04). Ten- year survival also was better in those without versus those with ischemia(90% vs 64% , P=.02). Five- year survival could be stratified by SSS risk categories: low risk(SSS ≥ 53), 97% ; intermediate risk(SSS=48- 52), 94% ; and high risk(SSS ≤ 47), 79% (P=.04). Bivariate models of SSS and other significant covariates supported an independent relation of SSS to cardiovascular death. Conclusions: In an older population of patients with HCM referred for SPECT imaging, abnormal stress MPI identifies those at increased risk of cardiovascular death.
文摘目的通过观察缺血性脑卒中患者行肢体缺血后适应治疗前后脑血流灌注及葡萄糖代谢变化,了解单光子发射计算机断层摄影(SPECT)在肢体缺血后适应患者疗效评价中的价值。方法连续选择2009~2011年在北京宣武医院脑卒中治疗中心接受治疗的67例脑卒中患者。入组患者被随机分为2组:后适应组43例和对照组24例,治疗前及治疗后6个月分别行SPECT检查。结果 2组患者治疗前脑血流灌注及脑葡萄糖代谢显像,患侧额、颞、顶、枕叶、基底节和丘脑病灶分布无统计学差异(P〉0.05)。后适应组患者基底节(0.97±0.10 vs 0.93±0.09,P=0.000)和丘脑(0.99±0.09 vs 0.95±0.09,P=0.003)治疗后放射性计数比值较治疗前明显升高(P〈0.05)。结论肢体缺血后适应治疗能改善缺血脑组织对缺血的耐受,通过SPECT检查发现经肢体缺血后适应治疗的患者基底节和丘脑血流灌注改善明显。