## 3 Results
### Analysis of Intervals Extracted between the Fiducial Points of ECG  
The extracted intervals of the stroke and control groups between the fiducial points of the ECG are represented in Table 4. The RR-I value represents the time between the QRS complexes that was noted to be lower in the stroke subjects than the control group (890 \(\pm\) 140 ms vs. 920 \(\pm\) 130 ms) and exhibits no significant difference (\(p\) > 0.05). Consequently, the heart rates were 68.87 \(\pm\) 11.7 bpm for the stroke subjects, while the control group were 66.51 \(\pm\) 9.89 bpm. The PRQ, which is the time interval measured from the beginning of the P wave to the peak of the R wave, appeared slightly lower among the subjects with strokes than the control subjects (179 \(\pm\) 26 ms vs. 182 \(\pm\) 28 ms, \(p\) > 0.05). The time interval of the QRS complex between the two groups showed no significant results, but an increasing trend was noticed among the stroke subjects.  
The results revealed that the amplitude of the P wave (P-H) appeared slightly lower among the stroke group, whereas the R wave amplitude (R-H) was more pronounced in the stroke group. Furthermore, the QT interval measured from the start of the Q wave to the end of the T wave was statistically significant (F = 5.30, \(p\) = 0.029), followed by the Tukey's test, which represented the mean score for the stroke group (512 \(\pm\) 56) and was significantly  
\begin{table}
\begin{tabular}{c c c c} \hline \hline
**Features** & **Stroke Group (_n = 52_)** & **Control Group (_n = 80_)** & _p-Value_ \\ \hline RR-I (ms) & 890 \(\pm\) 140 & 920 \(\pm\) 130 & 0.315 \\ HR (bpm) & 68.87 \(\pm\) 11.7 & 66.51 \(\pm\) 9.89 & 0.242 \\ PRQ (ms) & 179 \(\pm\) 26 & 182 \(\pm\) 28 & 0.542 \\ QRS (ms) & 113 \(\pm\) 22 & 107 \(\pm\) 14 & 0.095 \\ P-H (mV) & 72 \(\pm\) 20 & 74 \(\pm\) 30 & 0.769 \\ R-H (mV) & 720 \(\pm\) 76 & 690 \(\pm\) 79 & 0.770 \\ QTc (ms) & 543 \(\pm\) 45 & 557 \(\pm\) 37 & 0.074 \\ QT (ms) & 512 \(\pm\) 56 & 533 \(\pm\) 46 & 0.029 \\ ST (ms) & 427 \(\pm\) 59 & 452 \(\pm\) 49 & 0.014 \\ \hline \hline \end{tabular} \(p\) < 0.05 is considered as significant between the stroke and control groups, and the intervals are expressed in mean \(\pm\) standard deviations. RR-I: RR intervals, HR: heart rate, PRQ: time interval measured from the beginning of the P wave to peak of the R wave, QRS: time interval of the QRS complex, P-H: amplitude of P wave, R-H: amplitude of R wave, QTc: corrected QT interval, QT: time interval measured from beginning of the Q wave to the end of the T wave and ST: time interval measured after the S wave to the beginning of the T wave.  
\end{table}
Table 4: Fiducial features of the electrocardiogram (ECG).  
Figure 5: Bar graph illustration of the mean and standard deviation values of the statistical and impulsive metric variables of the stroke and control groups.  
different than the control group (533 \(\pm\) 46). Although, the corrected QT interval (QTc) showed a downward trend similar to the QT interval, with no statistically significant results. Additionally, the time interval measured after the S wave to the beginning of the T wave, called the ST interval, showed significance (F = 6.70, \(p\) = 0.014), and the [PERSON]'s test indicated that the mean score of the stroke subjects (427 \(\pm\) 59) was more statistically significant than the control subjects (452 \(\pm\) 49). To summarize from the results, the QT and ST are the two intervals that showed a significant difference between the two groups illustrated as boxplot graphs in Figure 6.