Heart rate variability analysis to investigate autonomic nervous system activity among the three premature ventricular complex circadian types: An observational study

Background and Objective@#Premature ventricular complex (PVC) burden exhibits one of three circadian types, classified as fast-type, slow-type, and independent-type PVC. It is unknown whether PVC circadian types have different heart rate variability (HRV) parameter values. Therefore, this study aimed to evaluate differences in HRV circadian rhythm among fast-, slow-, and independent-type PVC. @*Methods@#This cross-sectional observational study consecutively recruited 65 idiopathic PVC subjects (23 fast-, 20 slow-, and 22 independent-type) as well as five control subjects. Each subject underwent a 24-hour Holter to examine PVC burden and HRV. HRV analysis included components that primarily reflect global, parasympathetic, and sympathetic activities. Repeated measures analysis of variance was used to compare differences in HRV circadian rhythm by PVC type. Results. The average PVC burden was 15.7%, 8.4%, and 13.6% in fast-, slow-, and independent-type idiopathic PVC subjects, respectively. Global, parasympathetic nervous system, and sympathetic nervous system HRV parameters were significantly lower in independenttype PVC versus fast- and slow-type PVC throughout the day and night. Furthermore, we unexpectedly found that tendency towards sympathetic activity dominance during nighttime was only in independent-type PVC.@*Conclusion@#The HRV parameters are reduced in patients with independent-type PVC compared to fast- and slowtype PVC. Future research is warranted to determine possible differences in the prognosis between the three PVC types.

Deeper look into feedback practice in an Indonesian context: exploration of factors in undergraduate clinical settings / 한국의학교육

Purpose@#The practice of feedback is influenced by the characteristics of students, teachers, and the clinical environment. Most studies on feedback have been conducted in Western settings with different sociocultural backgrounds to Indonesia. This study explores feedback in Indonesian clinical clerkship using a sociocultural lens and aims to provide an exemplar of adaptive practice relevant to non-Western settings. @*Methods@#This qualitative study was conducted using an interpretive phenomenology approach. Data were collected through focus groups with students and teachers and interviews with program coordinators. Data were transcribed verbatim and grouped according to data sources, coded, and analyzed thematically. @*Results@#Themes identified from the focus group discussions and interviews were categorized as student, teacher, and environmental factors. Student factors include dependence on feedback, tendencies to use a group approach, difficulties recognizing social rules, a perceived lack of resilience, and tendencies to doubt praise. Factors related to teachers include a high level of expertise, being extremely busy, having a strong commitment, and being unsure of students’ acceptance of feedback. Clinical environment factors influence interactions between teachers and learners and include high power distance and collectivistic values. A safe environment is needed to ensure effective feedback interactions. @*Conclusion@#High power distance, collectivism, and generational characteristics of students likely impact feedback practice in clinical settings. Designing a safe environment is essential for effective feedback practice.