为方便查阅和理解MIT心拍类型，特注释各类心拍的类型，方便用于心电信号类型的分类研究。
| label_store | symbol | description | 中文描述 |
| 0 | Not an actual annotation | ||
| 1 | N | Normal beat | 正常心搏 |
| 2 | L | Left bundle branch block beat | 左束支传导阻滞 |
| 3 | R | Right bundle branch block beat | 右束支传导阻滞 |
| 4 | a | Aberrated atrial premature beat | 异常心房早搏 |
| 5 | V | Premature ventricular contraction | 室性早搏 |
| 6 | F | Fusion of ventricular and normal beat | 心室融和心搏 |
| 7 | J | Nodal (junctional) premature beat | 交界性早搏 |
| 8 | A | Atrial premature contraction | 房性早搏 |
| 9 | S | Premature or ectopic supraventricular beat | 早搏或室上性一尾心搏 |
| 10 | E | Ventricular escape beat | 室性逸搏 |
| 11 | j | Nodal (junctional) escape beat | 交界性逸搏 |
| 12 | / | Paced beat | 起搏心拍 |
| 13 | Q | Unclassifiable beat | 无法分类的节拍 |
| 14 | ~ | Signal quality change | 信号质量变化 |
| 16 | | | Isolated QRS-like artifact | 像人造的异位心搏 |
| 18 | s | ST change | St改变 |
| 19 | T | T-wave change | T波改变 |
| 20 | * | Systole | 心脏收缩 |
| 21 | D | Diastole | 心脏舒张 |
| 22 | " | Comment annotation | 注释注释 |
| 23 | = | Measurement annotation | 测量注释 |
| 24 | p | P-wave peak | P波峰值 |
| 25 | B | Left or right bundle branch block | 传导阻滞心搏 |
| 26 | ^ | Non-conducted pacer spike | 起搏器伪迹 |
| 27 | t | T-wave peak | T波峰值 |
| 28 | + | Rhythm change | 节律变化 |
| 29 | u | U-wave peak | U波峰值 |
| 30 | ? | Learning | |
| 31 | ! | Ventricular flutter wave | 心室颤动 |
| 32 | [ | Start of ventricular flutter/fibrillation | 开始心室扑动/颤动 |
| 33 | ] | End of ventricular flutter/fibrillation | 结束心室扑动颤动 |
| 34 | e | Atrial escape beat | 房性逸搏 |
| 35 | n | Supraventricular escape beat | 室上性逸搏 |
| 36 | @ | Link to external data (aux_note contains URL) | |
| 37 | x | Non-conducted P-wave (blocked APB) | 未下传的P波 |
| 38 | f | Fusion of paced and normal beat | 起搏融合心跳 |
| 39 | ( | Waveform onset PQ junction（begin of QRS） | QRS波开始 |
| 40 | ) | Waveform end IPT junction(J point,end of QRS) | QRS波结束 |
| 41 | r | R-on-T premature ventricular contraction | R波落在T上的室性早搏 |
