The goal of this clinical study is to find out which treatment works best for people with persistent atrial fibrillation (a type of irregular heartbeat). Researchers are comparing two types of heart ablation procedures:
* An anterior mitral line ablation (a treatment at the front part of the heart)
* A posterior mitral line ablation (at the back of the heart), sometimes with an extra step using a small vein called the Vein of Marshall
The main questions the study aims to answer are:
* Which approach works better at fixing the heart rhythm?
* Which approach is safer (less complications)?
People who take part in this study will:
* Undergo an ablation procedure as part of their standard care
* Attend follow-up visits at 1, 3, and 6 months
* Have tests like ECGs, heart ultrasound (echocardiogram), blood tests, heart rhythm monitors (Holter), and a heart CT scan