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Left Ventricular Dysfunction and Exercise Capacity Trajectory: Implications for Subclinical Heart Failure Staging Criteria.
JACC: Cardiovascular Imaging ( IF 12.8 ) Pub Date : 2018-02-14 , DOI: 10.1016/j.jcmg.2017.10.023
Julian W Sacre 1 , Chiew Wong 2 , Yih-Kai Chan 3 , Melinda J Carrington 4 , Simon Stewart 4 , Bronwyn A Kingwell 1
Affiliation  

OBJECTIVES This study aimed to determine the association of stage B heart failure (SBHF) and its constituent left ventricular (LV) abnormalities with trajectory of exercise capacity over time, and assess whether this association is modified by reversion of these LV abnormalities to normal. BACKGROUND The LV abnormalities of SBHF may coincide with a reduction in exercise capacity that precedes the overt exercise intolerance of clinical heart failure (HF). Determining the predictive capacity of established and novel SBHF criteria for exercise capacity decline may improve HF risk stratification. METHODS LV structure/function (echocardiography) and exercise capacity (6-min walk distance [6MWD]) were assessed at baseline and 3-year follow-up in 268 patients from the NIL-CHF (Nurse-led Intervention for Less Chronic Heart Failure) study (all stage A [SAHF] or SBHF). Changes (Δ) in 6MWD were compared between SAHF and SBHF and across each of 4 constituent components of SBHF: LV hypertrophy, regional wall motion abnormality(ies) (RWMA), left ventricular systolic dysfunction (LVSD) (ejection fraction <45%) and elevated early diastolic filling/annular velocity ratio (E/e' ≥15). RESULTS Δ6MWD was similar in those with SAHF (n = 141) and SBHF (n = 127; -5 m [95% confidence interval (CI): -21 to +11 m]; covariate-adjusted). However, within the setting of SBHF there was substantive heterogeneity; that is, reductions in 6MWD were observed with persistent elevated E/e' (-34 m [95% CI: -62 to -6 m]) and persistent LVSD (-41 m [95% CI: -74 to -8 m]), but not with LV hypertrophy (+17 m [95% CI: -15 to +49 m) or RWMA (+5 m [-27 to +36 m]), nor in patients whose elevated E/e' or LVSD reverted to normal by 3 years (p > 0.10). CONCLUSIONS Elevated E/e' is associated with a similar degree of exercise capacity decline to LVSD, supporting that both LV functional criteria be considered in distinguishing SBHF from SAHF. That reversion of either manifestation of LV dysfunction was associated with preserved exercise capacity advocates targeting of these factors by HF preventive interventions.

中文翻译:

左心功能不全和运动能力轨迹:对亚临床心力衰竭分期标准的含义。

目的本研究旨在确定B期心力衰竭(SBHF)及其构成的左心室(LV)异常与运动能力随时间的推移之间的关系,并评估是否可以通过将这些LV异常恢复为正常来改变这种关联。背景技术SBHF的LV异常可能与运动能力下降同时发生,而运动能力的下降是在临床心力衰竭(HF)的明显运动不耐受之前。确定已建立的和新颖的SBHF运动能力下降标准的预测能力可能会改善HF风险分层。方法在基线和3年随访中,对268例NIL-CHF患者的左室结构/功能(超声心动图)和运动能力(6分钟步行距离[6MWD])进行了评估(以护士为主导的干预措施,以减少慢性心力衰竭) )研究(所有A期[SAHF]或SBHF)。比较了SAHF和SBHF以及SBHF的4个组成部分中的6MWD的变化(Δ):LV肥大,区域壁运动异常(RWMA),左心室收缩功能障碍(LVSD)(射血分数<45%)早期舒张期充盈/环形速度之比升高(E / e'≥15)。结果SAHF(n = 141)和SBHF(n = 127; -5 m [95%置信区间(CI):-21至+11 m];经协变量调整)的Δ6MWD相似。但是,在SBHF的背景下,存在实质性的异质性。那是,持续升高的E / e'(-34 m [95%CI:-62至-6 m])和持续LVSD(-41 m [95%CI:-74至-8 m])观察到6MWD降低,但不适用于LV肥大(+17 m [95%CI:-15至+49 m]或RWMA(+5 m [-27至+36 m]),也不适用于E / e'或LVSD升高的患者正常3年(p> 0.10)。结论E / e'升高与LVSD的运动能力下降程度相似,支持在区分SBHF和SAHF时考虑两个LV功能标准。左室功能障碍的任何一种表现的逆转都与运动能力的保持者提倡通过HF预防性干预针对这些因素有关。-15至+49 m)或RWMA(+5 m [-27至+36 m]),或者E / e'或LVSD升高3年后恢复正常的患者(p> 0.10)。结论E / e'升高与LVSD的运动能力下降程度相似,支持在区分SBHF和SAHF时考虑两个LV功能标准。左室功能障碍的任何一种表现的逆转都与运动能力的保持者提倡通过HF预防性干预针对这些因素有关。-15至+49 m)或RWMA(+5 m [-27至+36 m]),或者E / e'或LVSD升高3年后恢复正常的患者(p> 0.10)。结论E / e'升高与LVSD的运动能力下降程度相似,支持在区分SBHF和SAHF时考虑两个LV功能标准。左室功能障碍的任何一种表现的逆转都与运动能力的保持者提倡通过HF预防性干预针对这些因素有关。
更新日期:2019-05-16
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