13 August 2020: Clinical Research
High versus Low Mechanical Index Imaging Diagnostic Ultrasound in Patients with Myocardial Infarction: A Therapeutic Application Study
Zongbao Niu 1ABF , Xiaolan Lv 1CDF , Jianhua Zhang 2ABCF , Tianping Bao 3DEFDOI: 10.12659/MSM.923583
Med Sci Monit 2020; 26:e923583
Table 1 Demographical, clinical, and pre-percutaneous coronary interventions characteristics.
| Characteristics | Cohorts | Comparisons between cohorts | ||
|---|---|---|---|---|
| Ultrasound diagnosis | Low acoustic energy | High acoustic energy | ||
| Numbers of patients | 199 | 251 | P-value | |
| Age | Minimum | 40 | 40 | 0.059 |
| Maximum | 70 | 70 | ||
| Mean±SD | 54.12±3.45 | 54.71±3.15 | ||
| Ethnicity | Han Chinese | 180 (90) | 223 (89) | 0.791 |
| Mongolian | 17 (9) | 26 (10) | ||
| Tibetan | 2 (1) | 2 (1) | ||
| Gender | Male | 175 (88) | 209 (83) | 0.181 |
| Female | 24 (12) | 42 (17) | ||
| Smoking | Non-smoker | 133 (67) | 149 (59) | 0.266 |
| Current smoker | 42 (21) | 65 (26) | ||
| Smoker | 24 (12) | 37 (15) | ||
| Diabetes | 33 (17) | 53 (21) | 0.231 | |
| Hyperlipidemia | 35 (18) | 57 (23) | 0.197 | |
| Blood pressure (mmHg) | Systolic pressure | 135±4 | 134±7 | 0.073 |
| Diastolic pressure | 84±5 | 85±6 | 0.060 | |
| Heart rate (bpm) | 76±7 | 77±7 | 0.133 | |
| % Oxygen saturation | 96±2 | 95.7±1.5 | 0.070 | |
| The culprit vessel (thrombolysis in myocardial Infarction flow grade 1 or 2)* | 181 (77) | 239 (80) | 0.461 | |
| Maximum% ST segment resolution | 3.11±0.15 | 3.14±0.22 | 0.101 | |
| Wall motion score index | 1.81±0.52 | 1.78±0.49 | 0.531 | |
| % Ejection fraction | 37±6 | 38±7 | 0.101 | |
| Microvascular obstruction* | 83 (35) | 109 (36) | 0.856 | |
| Ordinal and constant data are shown as frequency (percentage) and numerical data are shown as mean±standard deviation (SD). The Fischer’s exact test was performed for ordinal data and the Mann-Whitney U test was performed for numerical data. * Frequency with respect to the total number of infarct vessels. | ||||