AUTHOR=Liu Chang , Zheng Fei , Gao Yuxia , Wang Zheming , Zhang Xinyu , Tian Xiuqing TITLE=Case Report: Dual-chamber pacemaker for hypertrophic cardiomyopathy with bradyarrhythmia and idiopathic pericardial effusion: a report of two cases and literature review JOURNAL=Frontiers in Cardiovascular Medicine VOLUME=12 YEAR=2025 URL=https://www.frontiersin.org/journals/cardiovascular-medicine/articles/10.3389/fcvm.2025.1518000 DOI=10.3389/fcvm.2025.1518000 ISSN=2297-055X