BACKGROUND The de Winter electrocardiography(ECG)pattern is a sign that implies proximal left anterior descending coronary artery occlusion in patients with chest pain.The previous view was that the de Winter ECG patt...BACKGROUND The de Winter electrocardiography(ECG)pattern is a sign that implies proximal left anterior descending coronary artery occlusion in patients with chest pain.The previous view was that the de Winter ECG pattern is static.CASE SUMMARY A 65-year-old man presented with sudden chest pain at rest associated with diaphoresis for 55 min.The first ECG showed only T-wave inversion in III and aVF leads.Another ECG was performed at the 100th minute,showing upsloping ST segments depressed with tall and symmetrical T waves in the precordial leads;the J point was raised by 0.1 mV at the aVR lead.The patient was referred to our catheterization laboratory.A third ECG showed ST segment elevation by 0.2 mV in the I and aVL leads.The patient underwent emergency coronary angiography,which revealed complete proximal left anterior descending coronary(LAD)occlusion.The second patient presented with a 1-h history of sudden-onset,severe,substernal crushing chest pain.The first ECG showed STsegment elevation(0.1–1.7 mV)in I,aVL,and precordial leads.The patient was referred to the catheterization laboratory.On arrival,his symptoms alleviated,and ECG showed that the ST-segments had significantly fallen back.The third ECG showed a typical de Winter pattern.Coronary angiography revealed 99%stenosis of the middle LAD.CONCLUSION The de Winter ECG pattern is transient and dynamic,and it reflects proximal or mid-LAD subtotal occlusion rather than total occlusion.展开更多
Objective To determine whether sleep-disordered breathing (SDB) may lead to nocturnal myocardial ischemia and whether the severity of this ischemia may be relieved by nasal continuous positive airway pressure (CPAP). ...Objective To determine whether sleep-disordered breathing (SDB) may lead to nocturnal myocardial ischemia and whether the severity of this ischemia may be relieved by nasal continuous positive airway pressure (CPAP). Methods Overnight polysomnogram examination and simultaneous 3-channel Holter monitoring were performed on 76 patients with moderate to severe SDB and no history of coronary heart disease. All the cases were treated with CPAP for one night. ST depression was defined as a ST segment decrease of more than 1 mm from baseline and lasting 1 min or more. The total duration (minutes) of ST depression was indexed to the total sleep time (minutes per hour of sleep). Results Twenty-eight patients (37%) showed ST segment depression during their sleep. Before CPAP treatment, the respiratory disturbance index (RDI) and arousal index were significantly higher during periods of ST depression than when ST segments were isoelectric, whereas no significant difference was found in blood oxygen saturation (SaO2). After the CPAP treatment of patients with ST depression, the duration of ST depression was significantly reduced from 36.8±18.9 to 11.4±13.2 min/h (P<0.05). ST depression-related indexes, including RDI, arousal index and the percentage of sleep time spent at SaO2 below 90% (TS90/ TST), were all significantly decreased, with RDI from 63.4±23.8 to 8.1±6.6 /h, arousal index from 51.2±18.9 to 9.6±5.4 /h, and TS90/ TST from 50.6±21.4 to 12.9±14.7% (P<0.05). Conclusion ST-segment depression is rather common in patients with moderate to severe SDB, and CPAP treatment can significantly reduce the duration of ST depression. ST depression in these patients may reflect the myocardial ischemia that really exists and the non-ischemic changes associated with recurrent SDB.展开更多
目的探讨平板运动试验出现运动中心电图上斜型ST段下降及运动后合并ST段水平或下斜型下降与冠状动脉狭窄程度的关系。方法从2013年-2014年行平板运动试验检查的患者2095例患者中,选取99例平板运动试验出现运动中心电图上斜型ST段下降〉0...目的探讨平板运动试验出现运动中心电图上斜型ST段下降及运动后合并ST段水平或下斜型下降与冠状动脉狭窄程度的关系。方法从2013年-2014年行平板运动试验检查的患者2095例患者中,选取99例平板运动试验出现运动中心电图上斜型ST段下降〉0.10 m V并行冠状动脉造影检查（CAG）的患者,根据CAG中病变最严重血管的狭窄程度结果分为4组：A组（无狭窄）12例,B组（0-50%）15例,C组（51%-75%）23例,D组（76%-100%）49例。对4组患者一般情况、平板运动试验前中后各项指标、静息心率、最大目标百分比、运动时间、METS值、运动时心电图ST段下降最大值、运动时ST段下降持续时间、运动后是否合并ST段下降、平板运动试验结果等进行分析。结果 4组患者一般情况、静息心律、最大目标百分比、运动时间、运动耐量（METs）比较,差异无统计学意义（P〉0.05）,均衡性较好;4组患者心电图上斜性ST段持续时间比较,差异有统计学意义（P〈0.01）,恢复期合并ST段下降与冠状动脉狭窄程度具有相关性（P=0.014,spearman等级相关系数为0.3141）。运动后出现心电图ST段下降多为水平型或下斜型（89.6%）。结论平板运动试验恢复期心电图ST段下降与冠状动脉狭窄程度有相关性,可作为判别冠状动脉狭窄程度的辅助指标。展开更多
文摘BACKGROUND The de Winter electrocardiography(ECG)pattern is a sign that implies proximal left anterior descending coronary artery occlusion in patients with chest pain.The previous view was that the de Winter ECG pattern is static.CASE SUMMARY A 65-year-old man presented with sudden chest pain at rest associated with diaphoresis for 55 min.The first ECG showed only T-wave inversion in III and aVF leads.Another ECG was performed at the 100th minute,showing upsloping ST segments depressed with tall and symmetrical T waves in the precordial leads;the J point was raised by 0.1 mV at the aVR lead.The patient was referred to our catheterization laboratory.A third ECG showed ST segment elevation by 0.2 mV in the I and aVL leads.The patient underwent emergency coronary angiography,which revealed complete proximal left anterior descending coronary(LAD)occlusion.The second patient presented with a 1-h history of sudden-onset,severe,substernal crushing chest pain.The first ECG showed STsegment elevation(0.1–1.7 mV)in I,aVL,and precordial leads.The patient was referred to the catheterization laboratory.On arrival,his symptoms alleviated,and ECG showed that the ST-segments had significantly fallen back.The third ECG showed a typical de Winter pattern.Coronary angiography revealed 99%stenosis of the middle LAD.CONCLUSION The de Winter ECG pattern is transient and dynamic,and it reflects proximal or mid-LAD subtotal occlusion rather than total occlusion.
文摘Objective To determine whether sleep-disordered breathing (SDB) may lead to nocturnal myocardial ischemia and whether the severity of this ischemia may be relieved by nasal continuous positive airway pressure (CPAP). Methods Overnight polysomnogram examination and simultaneous 3-channel Holter monitoring were performed on 76 patients with moderate to severe SDB and no history of coronary heart disease. All the cases were treated with CPAP for one night. ST depression was defined as a ST segment decrease of more than 1 mm from baseline and lasting 1 min or more. The total duration (minutes) of ST depression was indexed to the total sleep time (minutes per hour of sleep). Results Twenty-eight patients (37%) showed ST segment depression during their sleep. Before CPAP treatment, the respiratory disturbance index (RDI) and arousal index were significantly higher during periods of ST depression than when ST segments were isoelectric, whereas no significant difference was found in blood oxygen saturation (SaO2). After the CPAP treatment of patients with ST depression, the duration of ST depression was significantly reduced from 36.8±18.9 to 11.4±13.2 min/h (P<0.05). ST depression-related indexes, including RDI, arousal index and the percentage of sleep time spent at SaO2 below 90% (TS90/ TST), were all significantly decreased, with RDI from 63.4±23.8 to 8.1±6.6 /h, arousal index from 51.2±18.9 to 9.6±5.4 /h, and TS90/ TST from 50.6±21.4 to 12.9±14.7% (P<0.05). Conclusion ST-segment depression is rather common in patients with moderate to severe SDB, and CPAP treatment can significantly reduce the duration of ST depression. ST depression in these patients may reflect the myocardial ischemia that really exists and the non-ischemic changes associated with recurrent SDB.
文摘目的探讨平板运动试验出现运动中心电图上斜型ST段下降及运动后合并ST段水平或下斜型下降与冠状动脉狭窄程度的关系。方法从2013年-2014年行平板运动试验检查的患者2095例患者中,选取99例平板运动试验出现运动中心电图上斜型ST段下降〉0.10 m V并行冠状动脉造影检查（CAG）的患者,根据CAG中病变最严重血管的狭窄程度结果分为4组：A组（无狭窄）12例,B组（0-50%）15例,C组（51%-75%）23例,D组（76%-100%）49例。对4组患者一般情况、平板运动试验前中后各项指标、静息心率、最大目标百分比、运动时间、METS值、运动时心电图ST段下降最大值、运动时ST段下降持续时间、运动后是否合并ST段下降、平板运动试验结果等进行分析。结果 4组患者一般情况、静息心律、最大目标百分比、运动时间、运动耐量（METs）比较,差异无统计学意义（P〉0.05）,均衡性较好;4组患者心电图上斜性ST段持续时间比较,差异有统计学意义（P〈0.01）,恢复期合并ST段下降与冠状动脉狭窄程度具有相关性（P=0.014,spearman等级相关系数为0.3141）。运动后出现心电图ST段下降多为水平型或下斜型（89.6%）。结论平板运动试验恢复期心电图ST段下降与冠状动脉狭窄程度有相关性,可作为判别冠状动脉狭窄程度的辅助指标。
