A series of related electrophysiology phenomena can be caused by the occurrence of interpolated ventricular premature contraction.In our recent three-dimensional Lorenz R-R scatter plot research,we found that atrioven...A series of related electrophysiology phenomena can be caused by the occurrence of interpolated ventricular premature contraction.In our recent three-dimensional Lorenz R-R scatter plot research,we found that atrioventricular node double path caused by interpolated ventricular premature contraction imprints a specifi c pattern on three-dimensional Lorenz plots generated from 24-hour Holter recordings.We found two independent subclusters separated from the interpolated premature beat precluster,the interpolated premature beat cluster,and the interpolated premature beat postcluster,respectively.Combined with use of the trajectory tracking function and the leap phenomenon,our results reveal the presence of the atrioventricular node double conduction path.展开更多
The coronary arteries diseases are one of the most causes of mortality and morbidity worldwide, particularly in the developing countries. Coronary obstructions are generally described by location and severity of steno...The coronary arteries diseases are one of the most causes of mortality and morbidity worldwide, particularly in the developing countries. Coronary obstructions are generally described by location and severity of stenosis. Manual tracing and measurement of the stenosis vessel in comparison to reference location of stenosis can be helpful to classify whether a lesion is significant or not. The aim of this study is to identify the dominant type of circulation carried out in patients presented in heart institute and associated with degree of stenosis in RCA and LAD artery. Materials and Methods: This was a retrospective study carried out on patients reporting to Heart Institute from June 2013 to August 2013 (311 patients records as a total coverage were collected as sample) whose coronary artery angiography revealed pathology in coronary arteries. Result: The findings were 71.7% right dominant, 23.5% left dominant and 4.8% co-dominant;LAD tends to be stricture with right dominant circulation type. LAD artery tends to be stenosis at proximal and mid segment while in the RCA tends to be stenosis in mid and distal segments. The right dominant artery is popular type of circulation in Sudanese people reported in Sudan Heart Institute;there is no significance association between gender and arterial type of circulation and also degree stenosis in LAD degree of stenosis in RCA. I observed that the site of stenosis in LAD artery was proximal and mid (P value < 0.05 significance association). Conclusion: Patients present at the heart institute are right dominant mostly coming with proximal and middle LAD stenosis unlike RCA which commonly presents with distal and middle stenosis, so the middle segment of coronary artery is stenosis in both situations. There are wild variations in dominance artery in relation to reduction of diameter in deferent ethic group. There are no significant associations between the gender and dominant artery.展开更多
Takotsubo syndrome(TTS),also known as stress cardiomyopathy,occurs in approximately 2%of all patients presenting with suspected acute coronary syndrome.[1]The in-hospital mortality rate of pati-ents with TTS is report...Takotsubo syndrome(TTS),also known as stress cardiomyopathy,occurs in approximately 2%of all patients presenting with suspected acute coronary syndrome.[1]The in-hospital mortality rate of pati-ents with TTS is reported to be approximately 4%-5%.[2]This condition is commonly associated with various rhythm and conduction disturbances,such as atrial fibrillation(5%-15%),ventricular arrhythmias(4%-9%),and rarely sinus node dysfunction(1.3%).展开更多
AIM: To compare the atrio-ventricular(AV/PV) delay optimization by echocardiography and intra-cardiac electrocardiogram(IEGM) based Quick Opt algorithm in complete heart block(CHB) patients, implanted with a dual cham...AIM: To compare the atrio-ventricular(AV/PV) delay optimization by echocardiography and intra-cardiac electrocardiogram(IEGM) based Quick Opt algorithm in complete heart block(CHB) patients, implanted with a dual chamber pacemaker. METHODS: We prospectively enrolled 20 patients(age 59.45 ± 18.1 years; male: 65%) with CHB, who were implanted with a dual chamber pacemaker. The left ventricular outflow tract velocity time-integral was measured after AV/PV delay optimization by both echocardiography and Quick Opt algorithm method. Bland-Altman analysis was used for agreement between the two techniques. RESULTS: The optimal AV and PV delay determined by echocardiography was 155.5 ± 14.68 ms and 122.5 ± 17.73 ms(P < 0.0001), respectively and by Quick Opt method was 167.5 ± 16.73 and 117.5 ms ± 9.10 ms(P < 0.0001), respectively. A good agreement was observed between optimal AV and PV delay as measured by two methods. However, the correlation of the optimal AV(r = 0.0689, P = 0.77) and PV(r = 0.2689, P = 0.25) intervals measured by the two techniques was poor. The time required for AV/PV optimization was 45.26 ± 1.73 min by echocardiography and 0.44 ± 0.08 min by Quick Opt method(P < 0.0001).CONCLUSION: The programmer based IEGM method is an automated, quick, easier and reliable alternative to echocardiography for the optimization of AV/PV delay in CHB patients, implanted with a dual chamber pacemaker.展开更多
文摘A series of related electrophysiology phenomena can be caused by the occurrence of interpolated ventricular premature contraction.In our recent three-dimensional Lorenz R-R scatter plot research,we found that atrioventricular node double path caused by interpolated ventricular premature contraction imprints a specifi c pattern on three-dimensional Lorenz plots generated from 24-hour Holter recordings.We found two independent subclusters separated from the interpolated premature beat precluster,the interpolated premature beat cluster,and the interpolated premature beat postcluster,respectively.Combined with use of the trajectory tracking function and the leap phenomenon,our results reveal the presence of the atrioventricular node double conduction path.
文摘The coronary arteries diseases are one of the most causes of mortality and morbidity worldwide, particularly in the developing countries. Coronary obstructions are generally described by location and severity of stenosis. Manual tracing and measurement of the stenosis vessel in comparison to reference location of stenosis can be helpful to classify whether a lesion is significant or not. The aim of this study is to identify the dominant type of circulation carried out in patients presented in heart institute and associated with degree of stenosis in RCA and LAD artery. Materials and Methods: This was a retrospective study carried out on patients reporting to Heart Institute from June 2013 to August 2013 (311 patients records as a total coverage were collected as sample) whose coronary artery angiography revealed pathology in coronary arteries. Result: The findings were 71.7% right dominant, 23.5% left dominant and 4.8% co-dominant;LAD tends to be stricture with right dominant circulation type. LAD artery tends to be stenosis at proximal and mid segment while in the RCA tends to be stenosis in mid and distal segments. The right dominant artery is popular type of circulation in Sudanese people reported in Sudan Heart Institute;there is no significance association between gender and arterial type of circulation and also degree stenosis in LAD degree of stenosis in RCA. I observed that the site of stenosis in LAD artery was proximal and mid (P value < 0.05 significance association). Conclusion: Patients present at the heart institute are right dominant mostly coming with proximal and middle LAD stenosis unlike RCA which commonly presents with distal and middle stenosis, so the middle segment of coronary artery is stenosis in both situations. There are wild variations in dominance artery in relation to reduction of diameter in deferent ethic group. There are no significant associations between the gender and dominant artery.
文摘Takotsubo syndrome(TTS),also known as stress cardiomyopathy,occurs in approximately 2%of all patients presenting with suspected acute coronary syndrome.[1]The in-hospital mortality rate of pati-ents with TTS is reported to be approximately 4%-5%.[2]This condition is commonly associated with various rhythm and conduction disturbances,such as atrial fibrillation(5%-15%),ventricular arrhythmias(4%-9%),and rarely sinus node dysfunction(1.3%).
文摘AIM: To compare the atrio-ventricular(AV/PV) delay optimization by echocardiography and intra-cardiac electrocardiogram(IEGM) based Quick Opt algorithm in complete heart block(CHB) patients, implanted with a dual chamber pacemaker. METHODS: We prospectively enrolled 20 patients(age 59.45 ± 18.1 years; male: 65%) with CHB, who were implanted with a dual chamber pacemaker. The left ventricular outflow tract velocity time-integral was measured after AV/PV delay optimization by both echocardiography and Quick Opt algorithm method. Bland-Altman analysis was used for agreement between the two techniques. RESULTS: The optimal AV and PV delay determined by echocardiography was 155.5 ± 14.68 ms and 122.5 ± 17.73 ms(P < 0.0001), respectively and by Quick Opt method was 167.5 ± 16.73 and 117.5 ms ± 9.10 ms(P < 0.0001), respectively. A good agreement was observed between optimal AV and PV delay as measured by two methods. However, the correlation of the optimal AV(r = 0.0689, P = 0.77) and PV(r = 0.2689, P = 0.25) intervals measured by the two techniques was poor. The time required for AV/PV optimization was 45.26 ± 1.73 min by echocardiography and 0.44 ± 0.08 min by Quick Opt method(P < 0.0001).CONCLUSION: The programmer based IEGM method is an automated, quick, easier and reliable alternative to echocardiography for the optimization of AV/PV delay in CHB patients, implanted with a dual chamber pacemaker.
