Table 3 Performance comparison of different methods across four target domains (metrics computed on the target domain).

Method	Target domain: MIT-BIH-sup arrhythmia					Target domain: MIT-BIH arrhythmia					Target domain: INCART					Target domain: SCD-holter
Method	Acc	Precision	Recall	F1-Score	AUC	Acc	Precision	Recall	F1-Score	AUC	Acc	Precision	Recall	F1-Score	AUC	Acc	Precision	Recall	F1-Score	AUC
Transformer³⁵	0.427	0.547	0.512	0.529	0.552	0.684	0.809	0.714	0.759	0.742	0.810	0.896	0.829	0.861	0.902	0.530	0.671	0.563	0.612	0.573
Metareg³⁶	0.469	0.476	0.472	0.474	0.571	0.726	0.738	0.674	0.705	0.758	0.852	0.825	0.798	0.807	0.908	0.572	0.625	0.527	0.559	0.588
Fsdr³⁷	0.402	0.541	0.498	0.519	0.541	0.659	0.803	0.702	0.748	0.723	0.785	0.891	0.815	0.851	0.892	0.505	0.665	0.549	0.601	0.564
Selfreg³⁸	0.488	0.528	0.489	0.508	0.583	0.745	0.791	0.691	0.737	0.782	0.871	0.877	0.806	0.846	0.912	0.591	0.652	0.543	0.591	0.613
Dlow³⁹	0.488	0.530	0.475	0.501	0.564	0.726	0.802	0.718	0.758	0.761	0.872	0.879	0.792	0.833	0.904	0.589	0.654	0.523	0.572	0.602
DPStyler⁴⁰	0.437	0.528	0.481	0.503	0.552	0.684	0.792	0.702	0.745	0.742	0.826	0.879	0.792	0.836	0.892	0.541	0.653	0.532	0.586	0.574
Dgmamba⁴¹	0.410	0.549	0.459	0.500	0.532	0.702	0.827	0.706	0.762	0.753	0.793	0.898	0.776	0.833	0.894	0.513	0.673	0.510	0.580	0.553
Ours	0.511	0.570	0.560	0.565	0.628	0.768	0.832	0.762	0.795	0.819	0.894	0.919	0.877	0.898	0.928	0.614	0.694	0.611	0.651	0.647

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