## 1 Introduction
\begin{table}
\begin{tabular}{l c c c c c c c} \hline \hline \multirow{2}{*}{**Literature**} & **R-Feak** & **MIT-BIH** & \multirow{2}{*}{**Testing Format**} & \multirow{2}{*}{**Window**} & \multicolumn{4}{c}{**Statistical Metrics**} \\ \cline{5-8}  & **Validation** & & & **Bears** & & **Size (ms)** & **FP** & **FN** & **Se (\%)** & **+P (\%)** \\ \hline [PERSON] et al. [24] & Bxb & 104,988 & Selective & NG & NG & 99.18 & 98.00 \\ [PERSON] et al. [25] & Bxb & 104,988 & Selective & NG & NG & NG & 99.18 & 98.00 \\ [PERSON] et al. [28] & Bxb & 109,494 & Entire Record & 50 & 3195 & NG & 87.48 & 89.39 \\ [PERSON] et al. [29] & Bxb & 91,285 & Entire Record & 150 & 295 & 267 & NG & NG \\ [PERSON] et al. [30] & Bxb & 109,494 & Abnormal Beats & 300 & NG & NG & 94.81 & NG \\ [PERSON] et al. [31] & Bxb & 109,401 & Entire Record & 100 & 91 & 93 & 99.92 & 99.92 \\ [PERSON] et al. [32] & NG & 109,966 & NG & 50 & 561 & 668 & 99.39 & 99.49 \\ [PERSON] et al. [33] & NG & 109,809 & Entire Record & 80 & 369 & 389 & 99.65 & 99.66 \\ [PERSON] et al. [34] & NG & 109,498 & Selective Records & 100 & 55 & 54 & 99.95 & 99.94 \\ [PERSON] et al. [35] & NG & 109,494 & NG & NG & 39 & 49 & 99.96 & 99.96 \\ [PERSON] et al. [56] & NG & 109,494 & NG & NG & 99 & 79 & 99.93 & 99.91 \\ [PERSON] et al. [37] & NG & 109,496 & NG & NG & 53 & 76 & 99.93 & 99.86 \\ [PERSON] et al. [38] & NG & 109,494 & Segment & NG & 76 & 53 & 99.93 & 99.95 \\ [PERSON] et al. [39] & NG & 109,474 & NG & NG & 116 & 58 & 99.95 & 99.88 \\ [PERSON] et al. [40] & NG & 91,314 & Selective & NG & 406 & 374 & 99.59 & 99.56 \\ [PERSON] et al. [41] & NG & 116,137 & NG & NG & 507 & 277 & 99.80 & 99.76 \\ [PERSON] et al. [42] & NG & 109,021 & NG & NG & 195 & 381 & 99.65 & 99.82 \\ [PERSON] et al. [43] & NG & 116,137 & NG & NG & 58 & 166 & 99.95 & 99.85 \\ [PERSON] et al. [44] & NG & 109,494 & Entire Record & 150 & 63 & 124 & 99.89 & 99.97 \\ [PERSON] at al. [45] & NG & 109,966 & Entire Record & NG & 494 & 911 & 99.17 & 99.55 \\ [PERSON] et al. [46] & NG & 109,428 & Entire Record & NG & 1216 & 651 & 98.89 & 99.44 \\ [PERSON] et al. [47] & NG & 109,985 & NG & NG & 82 & 247 & 99.78 & 99.92 \\ [PERSON] et al. [50] & www & NG & Selective & NG & NG & NG & NG \\ [PERSON] et al. [51] & NG & 109,494 & Entire Record & NG & 59 & NG & NG \\ [PERSON] et al. [52] & NG & 109,494 & Entire Record & NG & 136 & 200 & 99.82 & 99.88 \\ [PERSON] et al. [53] & NG & 109,494 & NG & NG & 155 & 193 & 99.82 & 99.85 \\ [PERSON] et al. [54] & NG & 91,285 & NG & NG & NG & NG & 99.90 & 99.87 \\ [PERSON] et al. [55] & NG & NG & Segment & NG & NG & NG & 99.98 & 100 \\ [PERSON] et al. [56] & NG & 109,497 & Entire Record & NG & 138 & 67 & 99.94 & 99.87 \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Provided ECG testing details in literature for evaluating MIT-BIH arrhythmia dataset. This review is structured as follows: Section 2 highlights literature search methods to provide a comprehensive overview of the search and evaluation strategy for the studies included in this narrative review. Section 3 covers available R-peak validation tools and their testing mechanism. Section 4 discusses the MIT-BIH dataset, window validation concept, identified discrepancies in the literature, their impact on statistical outcomes, and tolerance variations within a 0.15 s window. Section 5 addresses non-beat annotations and studies that fail to specify validation methods. Section 6 highlights numeric discrepancies in the literature regarding the individual or total number of beats for the MIT-BIH records and issues related to selective segment testing. Section 7 introduces a structured concept as a future prospect to provide a guide for integrating WFDB tools to simultaneously test, generate validation statistics and errors reports, and visualize FP and FN. Finally, Section 8 presents the conclusions of the review.