Background

The purpose of the present study was to determine the presence and magnitude of seasonal variation in daily physical activity (PA) in those with heart failure (HF).

Methods

Retrospective study and dynamic factor analysis (DFA) of Patient Activity data from Medtronic implanted cardioverter defibrillator and cardiac resynchronization devices (ICD/CRTs).

Results

In a data set of 435 patients, distinct states/trends were identified by DFA including a classic, sinusoidal pattern of seasonal variation and a pattern of decline over the course of 12 months, which were associated with specific clinical characteristics. Overall, model fitting was good.

Conclusions

Those with low comorbidities, better NYHA Class, higher BMI, no hospitalization, and male sex demonstrated greater seasonal variation of at least 40 min per day between winter (lowest PA) and spring/summer (highest PA). Those with female sex and hospitalization demonstrated overall downward trajectories of approximately 40 and 80 min, respectively, over the course of the year.

中文翻译：

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心力衰竭和植入心脏装置个体日常体力活动季节性变化的动态因素分析

背景

本研究的目的是确定心力衰竭 (HF) 患者日常体力活动 (PA) 的季节性变化的存在和幅度。

方法

来自 Medtronic 植入式心律转复除颤器和心脏再同步装置 (ICD/CRT) 的患者活动数据的回顾性研究和动态因素分析 (DFA)。

结果

在 435 名患者的数据集中，DFA 确定了不同的状态/趋势，包括季节性变化的经典正弦模式和 12 个月内下降的模式，这与特定的临床特征相关。总的来说，模型拟合是好的。

结论

那些合并症低、NYHA 等级较高、BMI 较高、未住院和男性的人在冬季（最低 PA）和春季/夏季（最高 PA）之间表现出更大的季节性变化，每天至少 40 分钟。在一年中，女性和住院患者的总体下降轨迹分别约为 40 分钟和 80 分钟。