Niamat, Farkhanda, Muneeza Saeed, Rahat Mudasar, Amber Naureen, Sidra Latif, and Muhammad Bin Muddassir. “Heart Rate Variability in Patients With Coronary Artery Disease and Effect of Percutaneous Coronary Angioplasty”. Journal of Fatima Jinnah Medical University 18, no. 01 (June 26, 2024). Accessed September 27, 2025. http://jfjmu.com/index.php/ojs/article/view/1209.