arrhythmia

**Author**: H. Altay Guvenir, Burak Acar, Haldun Muderrisoglu
**Source**: [UCI](https://archive.ics.uci.edu/ml/datasets/arrhythmia)
**Please cite**: [UCI](https://archive.ics.uci.edu/ml/citation_policy.html)

**Cardiac Arrhythmia Database**
The aim is to determine the type of arrhythmia from the ECG recordings. This database contains 279 attributes, 206 of which are linear valued and the rest are nominal.

Concerning the study of H. Altay Guvenir: "The aim is to distinguish between the presence and absence of cardiac arrhythmia and to classify it in one of the 16 groups. Class 01 refers to 'normal' ECG classes, 02 to 15 refers to different classes of arrhythmia and class 16 refers to the rest of unclassified ones. For the time being, there exists a computer program that makes such a classification. However, there are differences between the cardiologist's and the program's classification. Taking the cardiologist's as a gold standard we aim to minimize this difference by means of machine learning tools.

The names and id numbers of the patients were recently removed from the database.

### Attribute Information

1 Age: Age in years , linear
2 Sex: Sex (0 = male; 1 = female) , nominal
3 Height: Height in centimeters , linear
4 Weight: Weight in kilograms , linear
5 QRS duration: Average of QRS duration in msec., linear
6 P-R interval: Average duration between onset of P and Q waves
in msec., linear
7 Q-T interval: Average duration between onset of Q and offset
of T waves in msec., linear
8 T interval: Average duration of T wave in msec., linear
9 P interval: Average duration of P wave in msec., linear
Vector angles in degrees on front plane of:, linear
10 QRS
11 T
12 P
13 QRST
14 J
15 Heart rate: Number of heart beats per minute ,linear
Of channel DI:
Average width, in msec., of: linear
16 Q wave
17 R wave
18 S wave
19 R' wave, small peak just after R
20 S' wave
21 Number of intrinsic deflections, linear
22 Existence of ragged R wave, nominal
23 Existence of diphasic derivation of R wave, nominal
24 Existence of ragged P wave, nominal
25 Existence of diphasic derivation of P wave, nominal
26 Existence of ragged T wave, nominal
27 Existence of diphasic derivation of T wave, nominal
Of channel DII:
28 .. 39 (similar to 16 .. 27 of channel DI)
Of channels DIII:
40 .. 51
Of channel AVR:
52 .. 63
Of channel AVL:
64 .. 75
Of channel AVF:
76 .. 87
Of channel V1:
88 .. 99
Of channel V2:
100 .. 111
Of channel V3:
112 .. 123
Of channel V4:
124 .. 135
Of channel V5:
136 .. 147
Of channel V6:
148 .. 159
Of channel DI:
Amplitude , * 0.1 milivolt, of
160 JJ wave, linear
161 Q wave, linear
162 R wave, linear
163 S wave, linear
164 R' wave, linear
165 S' wave, linear
166 P wave, linear
167 T wave, linear
168 QRSA , Sum of areas of all segments divided by 10,
( Area= width * height / 2 ), linear
169 QRSTA = QRSA + 0.5 * width of T wave * 0.1 * height of T
wave. (If T is diphasic then the bigger segment is
considered), linear
Of channel DII:
170 .. 179
Of channel DIII:
180 .. 189
Of channel AVR:
190 .. 199
Of channel AVL:
200 .. 209
Of channel AVF:
210 .. 219
Of channel V1:
220 .. 229
Of channel V2:
230 .. 239
Of channel V3:
240 .. 249
Of channel V4:
250 .. 259
Of channel V5:
260 .. 269
Of channel V6:
270 .. 279

Class code - class - number of instances:
>
01 Normal 245
02 Ischemic changes (Coronary Artery Disease) 44
03 Old Anterior Myocardial Infarction 15
04 Old Inferior Myocardial Infarction 15
05 Sinus tachycardy 13
06 Sinus bradycardy 25
07 Ventricular Premature Contraction (PVC) 3
08 Supraventricular Premature Contraction 2
09 Left bundle branch block 9
10 Right bundle branch block 50
11 1. degree AtrioVentricular block 0
12 2. degree AV block 0
13 3. degree AV block 0
14 Left ventricule hypertrophy 4
15 Atrial Fibrillation or Flutter 5
16 Others 22
-----
We have redefined the number of classes to account for the real number of observations.

**作者**：H. Altay Guvenir、Burak Acar、Haldun Muderrisoglu
**来源**：[UCI](https://archive.ics.uci.edu/ml/datasets/arrhythmia)
**引用说明**：[UCI](https://archive.ics.uci.edu/ml/citation_policy.html)

**心律失常数据库**
本数据库旨在通过心电图（ECG）记录判断心律失常类型。它包含279个属性，其中206个为线性数值型，其余为名义型。

关于H. Altay Guvenir的研究：该研究旨在区分是否存在心律失常，并将其分为16组中的一类。01类为“正常”心电图（ECG）类别，02至15类为不同类型的心律失常，16类为其余未分类情况。目前已有计算机程序可进行此类分类，但心脏病学家（cardiologist）与程序的分类结果存在差异。本研究以心脏病学家的判断为金标准，旨在通过机器学习工具最小化这一差异。

患者姓名及ID号已从数据库中移除。

### 属性信息

1 年龄：单位为年，线性数值型
2 性别：（0=男性；1=女性），名义型
3 身高：单位为厘米，线性数值型
4 体重：单位为千克，线性数值型
5 QRS持续时间：QRS波群平均持续时间，单位为毫秒（msec.），线性数值型
6 P-R间期：P波起始至Q波起始的平均持续时间，单位为毫秒，线性数值型
7 Q-T间期：Q波起始至T波结束的平均持续时间，单位为毫秒，线性数值型
8 T间期：T波平均持续时间，单位为毫秒，线性数值型
9 P间期：P波平均持续时间，单位为毫秒，线性数值型
额面（front plane）向量角度（单位：度），线性数值型：
10 QRS
11 T
12 P
13 QRST
14 J
15 心率：每分钟心跳次数，线性数值型
DI导联（channel DI）相关：
平均宽度（单位：毫秒），线性数值型：
16 Q波
17 R波
18 S波
19 R'波（R波后紧随的小峰）
20 S'波
21 内在偏转次数，线性数值型
22 R波是否粗糙，名义型
23 R波是否存在双相衍生，名义型
24 P波是否粗糙，名义型
25 P波是否存在双相衍生，名义型
26 T波是否粗糙，名义型
27 T波是否存在双相衍生，名义型
DII导联（channel DII）相关：
28..39（与DI导联的16..27类似）
DIII导联：
40..51
AVR导联：
52..63
AVL导联：
64..75
AVF导联：
76..87
V1导联：
88..99
V2导联：
100..111
V3导联：
112..123
V4导联：
124..135
V5导联：
136..147
V6导联：
148..159
DI导联相关振幅（单位：0.1毫伏），线性数值型：
160 JJ波
161 Q波
162 R波
163 S波
164 R'波
165 S'波
166 P波
167 T波
168 QRSA：所有段面积之和除以10（面积=宽度×高度/2），线性数值型
169 QRSTA = QRSA + 0.5×T波宽度×0.1×T波高度（若T波为双相，则取较大段），线性数值型
DII导联：
170..179
DIII导联：
180..189
AVR导联：
190..199
AVL导联：
200..209
AVF导联：
210..219
V1导联：
220..229
V2导联：
230..239
V3导联：
240..249
V4导联：
250..259
V5导联：
260..269
V6导联：
270..279

类别代码 - 类别 - 实例数量：
>
01 正常 245
02 缺血性改变（冠状动脉疾病）44
03 陈旧性前壁心肌梗死15
04 陈旧性下壁心肌梗死15
05 窦性心动过速13
06 窦性心动过缓25
07 室性早搏（PVC）3
08 室上性早搏2
09 左束支传导阻滞9
10 右束支传导阻滞50
11 一度房室传导阻滞0
12 二度房室传导阻滞0
13 三度房室传导阻滞0
14 左心室肥厚4
15 心房颤动或扑动5
16 其他22
-----
我们已重新定义类别数量，以反映实际观察数量。