Ramzi Al-Sharawi
Ramzi Al-Sharawi has 1 paper in the ChatPPG research atlas (2026) and 2 co-authors in the atlas. Main topics: ECG, self-supervised-learning, foundation-model, tokenization, long-context, ambulatory.
Papers
- The Impact of Temporal Context Length and Encoding Strategies on Self-Supervised ECG Representation Learning2026 · arXiv preprint
This study tests how input length and input encoding affect self-supervised ECG models, using single-lead Icentia11k with the same Transformer throughout. It compared 16-second, 1-minute, 5-minute and 10-minute inputs, and continuous patch embeddings against fixed quantized tokens. Longer context beat 16-second snapshots for rhythm detection and patient retrieval, with the 5- and 10-minute models best.
- Published: arXiv preprint, 2026
- Data: Icentia11k single-lead ECG
- Variables: input length (16 s to 10 min), continuous vs VQ tokens