Exploration of cardiac rehabilitation nursing for elderly patients with myocardial infarction based on individualized cardiac rehabilitation

Table 1 Baseline demographic data and clinical characteristics [n (%), mean ± SD]

Item	Research group (n = 37)	Control group (n = 37)	t/χ2/Z	P value
Age (yr)	68.36 ± 7.19	68.92 ± 7.62	0.325	0.746
Gender			0.056	0.811
Man	22 (59.46)	23 (62.16)
Woman	15 (40.54)	14 (37.84)
BMI (kg/m²)	24.69 ± 2.12	24.35 ± 1.94	0.719	0.474
Smoking history	26 (70.27)	24 (29.73)	0.246	0.619
The PCI surgery	27 (72.97)	28 (75.67)	0.070	0.790
Complication
Hypertension	18 (48.65)	16 (43.24)	0.217	0.640
Diabetes	10 (27.02)	12 (32.43)	0.258	0.610
The Killip classification
The I class	28 (75.67)	27 (72.97)	0.235	0.797
The II class	9 (24.32)	10 (27.02)
The Gensini score	55.75 ± 3.82	56.16 ± 2.99	0.514	0.608
Medication history
β-blockers	28 (75.67)	30 (81.08)	0.318	0.572
Diuretic	12 (32.43)	13 (35.13)	0.060	0.805
ACEI	25 (67.56)	27 (72.97)	0.258	0.610
CCB	2 (5.40)	3 (8.10)	0.214	0.643

BMI: Body mass index; PCI: Percutaneous coronary intervention; ACEI: Angiotension converting enzyme inhibitors; CCB: Calcium channel blockers.

Table 2 The blood pressure variability variations (mean ± SD)

Item	Time	Research group (n = 37)	Control group (n = 37)	F/P value1	F/P value2	F/P value3
24DBPSD	T0	8.45 ± 0.62	8.57 ± 0.43	6.592/0.010	50.410/< 0.001	0.039/0.961
	T1	8.02 ± 0.23a,b	8.14 ± 0.25b
	T2	7.83 ± 0.31a,b	7.98 ± 0.27b
24SBPSD	T0	11.56 ± 1.05	11.74 ± 1.11	6.232/0.013	28.710/< 0.001	0.184/0.831
	T1	11.02 ± 0.79a,b	11.35 ± 0.58b
	T2	10.48 ± 0.61a,b	10.79 ± 0.57b

^aP < 0.05, compared with the control group.

^bP < 0.05, compared with T0.

¹The inter-group comparison.

²The time comparison.

³The interactive comparison between inter-group time.

24DBPSD: 24 h diastolic blood pressure variability; 24SBPSD: 24 h systolic blood pressure variability.

Table 3 The baroreflex sensitivity variation (mean ± SD, ms/mmHg)

Group	n	T0	T1	T2
Research group	37	4.38 ± 2.24	7.04 ± 2.56a,b	8.02 ± 3.54a,b
Control group	37	4.51 ± 2.32	5.82 ± 2.47b	6.12 ± 3.87b
F/P value1		6.542/0.011
F/P value2		16.450/< 0.001
F/P value3		2.344/0.098

^aP< 0.05, compared with the control group.

^bP < 0.05, compared with T0.

¹The inter-group comparison.

²The time comparison

³The interactive comparison between inter-group time.

Table 4 The changes in cardiopulmonary function indicators (mean ± SD)

Item	Time	Research group (n = 37)	Control group (n = 37)	F/P value1	F/P value2	F/P value3
Peak RPP (beat mmHg/100)	T0	151.36 ± 31.74	151.53 ± 30.39	5.482/0.020	6.732/0.001	1.512/0.223
	T1	165.53 ± 24.67a,b	154.96 ± 20.43
	T2	174.07 ± 25.92a,b	160.02 ± 20.15b
HRR1 (beat/min)	T0	13.02 ± 3.18	13.11 ± 3.46	7.079/0.008	15.040/< 0.001	1.964/0.142
	T1	16.74 ± 5.45a,b	14.19 ± 5.25
	T2	18.68 ± 5.37a,b	16.03 ± 5.32
VE/VCO2 slope	T0	31.21 ± 3.88	31.34 ± 3.52	10.110/0.001	30.900/< 0.001	2.369/0.096
	T1	28.44 ± 3.76a,b	30.27 ± 3.05
	T2	25.29 ± 3.38a,b	27.96 ± 4.02b

^aP < 0.05, compared with the control group.

^bP < 0.05, compared with T0.

¹The inter-group comparison.

²The time comparison.

³The interactive comparison between inter-group time.

Peak RPP: Peak heart rate and systolic blood pressure product; HRR1: 1 min heart rate recovery; VE/VCO₂ slope: Carbon dioxide ventilation equivalent slope.