The Role of Electrocardiographic Exercise Testing for the Possibility of Permanent Pacemaker Implantation in Patients with Sinus Bradycardia

Figures & data

Figure 1 Position showing results of electrocardiographic exercise testing.

Table 1 Proportion of Patients Who Did Not Achieve Target Indicators During Electrocardiographic Exercise Testing

Indicator	Number (n = 60)	Percentage (%)
Maximum heart rate < 85% of predicted maximum heart rate	27	45
Heart rate variability index < 0.8	32	53.3
Did not achieve 85% of predicted maximum exercise capacity	32	53.3
Heart rate decrease in the first 1 minute < 12 beats/minute	7	11.6

Table 2 Characteristics of Outcome Indicators During Electrocardiographic Exercise Testing

Indices of Heart Rate Variability and Blood Pressure During ECG Exercise Testing		Mean (X+SD)	Minimum Value	Maximum Value
Maximum exercise heart rate (beats/minute)		129,90 ± 29.22	80	168
Heart rate variability index (HRVI)		0.64 ± 0.25	0,16	1,03
Maximum exercise capacity (MEC)		7.78 ± 3.59	3,2	16
Heart rate decrease in the first minute of recovery (beats/minute)		27.87 ± 16.82	8	45
Systolic blood pressure (mmHg)	Pre-exercise standing posture	122.10 ± 2.23	100	140
	During peak exercise	155,23 ± 20.59	110	180
	Change in systolic blood pressure per MEC	4,84 ± 2.72
Diastolic blood pressure (mmHg)	Pre-exercise standing posture	72.50 ± 1.02	60	90
	During peak exercise	88,10 ± 9.11	70	110
	Change in diastolic blood pressure per MEC	2,4 ± 1.75

Table 3 Multivariable Logistic Regression to Assess the Relationship Between Achieving Target Indicators and Permanent Pacemaker Implantation

Predictive Variables	B Coefficient	OR	95% CI	P
Heart rate variability index < 0.8	3.069	21.521	2.27–04.34	0.008
Not achieving 85% of predicted maximum exercise capacity	1.762	5.826	0.92–37.04	0.062
Constant	−3.882	0.021		0.001

Note: Bold value indicates significance, P<0.01.