Search Results
Results 551 - 600 of 2018
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Dzwonczyk R - - 2006
Electrocardiogram (ECG) ST-segment changes are commonly used to diagnose myocardial ischemia. In this study we compared ST-segment changes with changes in myocardial electrical impedance (MEI)--an electrical parameter that also responses to ischemia--during off-pump coronary artery bypass graft (OPCABG) surgery of the left anterior descending coronary artery (LADa). We recorded MEI ...
Bogaty Peter - - 2006
BACKGROUND: A major change has occurred in the last few years in the therapeutic approach to patients presenting with all forms of acute coronary syndromes. Whether or not these patients present initially to tertiary cardiac care centers, they are now routinely referred for early coronary angiography and increasingly undergo percutaneous ...
Brocco Stefano - - 2006
OBJECTIVE: To assess the burden of hospitalization for acute coronary syndrome (ACS) and the impact of the new diagnostic criteria for acute myocardial infarction on epidemiology of ACSs. METHODS: We analysed the hospital discharge record archives of the Veneto Region in the period 2000-2003, including admissions of regional residents outside ...
Hendler Alberto - - 2006
Primary angioplasty has become the preferred therapeutic modality in patients with acute myocardial infarction (AMI). Despite restoration of antegrade epicardial flow by mechanical reperfusion therapy, angiographically assessed microvascular function and myocardial reperfusion (blush) allows for the stratification of patients with epicardial TIMI 3 flow into different strata of survival. Despite ...
Lund Juha - - 2006
BACKGROUND: Elevated circulating levels of pregnancy-associated plasma protein A (PAPP-A), a novel marker of atherosclerotic plaque instability, are associated with increased risk of future cardiac events in patients with acute coronary syndromes (ACS). However, little is known of the kinetics or clinical significance of circulating PAPP-A after plaque rupture in ...
Sabatine Marc S - - 2006
BACKGROUND: ST deviation and troponin are indicators of risk in unstable angina/non-ST-elevation myocardial infarction with related but distinct pathophysiology. We hypothesized that a combination of the two would offer complementary information regarding the benefit of an invasive strategy. METHODS AND RESULTS: Electrocardiogram and troponin data were gathered in 1846 patients ...
Potse Mark - - 2006
ST-segment depression in epicardial electrograms can be a "reciprocal" effect of remote myocardial ischemia (MI), and can also be due to local partial-thickness or "subendocardial" MI. Experimental studies have shown either ST elevation or depression in leads overlying a subendocardial ischemic region. Those reporting elevation have shown depression over the ...
Karha Juhana - - 2006
Advanced age is associated with worse prognosis among patients with acute ST-elevation myocardial infarction. Many eligible elderly patients with acute ST-elevation myocardial infarction, however, do not receive any reperfusion therapy at all. The risk of intracranial hemorrhage complicating fibrinolytic therapy increases with age. Furthermore, routine adjunctive stenting has made coronary ...
Jong Gwo-Ping - - 2006
Acute left main coronary artery (LMCA) occlusion may result in acute myocardial infarction (AMI) or sudden death. ST elevation in the aVR and V1 leads is reported to be valuable in recognizing LMCA occlusion. Early recognition of electrocardiogram (ECG) changes, such as reciprocal ST depression in other leads, is helpful ...
Sasaki Takeshi - - 2006
Two patients with life-threatening episodes of ventricular fibrillation (VF) showed typical ST elevation in V1-V3 leads. Both had spontaneous clinical episodes of resting angina. Intracoronary injection of acetylcholine provoked coronary vasospasm and ST elevation was the same as Brugada-type ST elevation in 1 case but not in the other. Calcium ...
Iakobishvili Zaza - - 2006
Recent studies highlighted the 'obesity paradox' after revascularization, suggesting a 'cardioprotective' effect of obesity. We assessed the association of BMI and regional wall motion score (RWMS) and peak CK and cTnI values (markers of infarct size) and 30-day survival among consecutive first ST-segment-elevation myocardial infarction patients who underwent successful primary ...
Sejersten Maria - - 2006
Successful reperfusion at the epicardial level is not always accompanied by reperfusion of the microvasculature. Therapies targeted against 'no-flow' are often employed in patients receiving primary percutaneous coronary intervention (pPCI) after acute myocardial infarction. Abciximab as adjunctive to pPCI will improve ST-segment resolution used as a surrogate for optimal microvascular ...
Mortensen Ulrik Markus - - 2006
ATP-sensitive potassium channels are opened during the course of ischemic preconditioning (IP). As experimental data suggest that opening of sarcolemmal ATP-sensitive potassium channels underlie ST elevation during myocardial ischemia, one would expect to observe increased ST elevation during ischemia following IP. However, clinical studies have reported IP to attenuate ST ...
Cho Jinsoo - - 2006
Heart disease is one of the more life-threatening diseases. Accurate diagnosis and treatment are central to the survival of patients. Numerous diagnostic methods that can assess abnormalities of the heart have been developed. Among these methods, cardiac functional analysis has been widely used to derive cardiac functional parameters that describe ...
Diercks Deborah B - - 2006
We sought to determine the frequency of electrocardiographic (ECG) acquisition within 10 minutes of hospital arrival, factors associated with delayed ECG acquisition, and any relation among delayed ECG acquisition, treatment patterns, and clinical outcomes. We therefore analyzed data from 63,478 patients (26,615 women, 42%) with high-risk non-ST-segment elevation acute coronary ...
De Luca Giuseppe - - 2005
BACKGROUND: The analysis of ST-segment resolution is a well established and easy method to assess myocardial perfusion after reperfusion therapy for ST-segment elevation myocardial infarction (STEMI). The aim of the current study was to identify an easy and practical instrument for patients' prognostic stratification after angioplasty for STEMI by the ...
Donahoe Sean M - - 2005
Acute coronary syndromes result from the rupture of an atherosclerotic plaque with superimposed thrombosis. In an ST-elevation myocardial infarction, the thrombus occludes the coronary vessel, leading to an abrupt decrease in myocardial perfusion. The focus of initial management is the timely restoration of flow in the infarct-related artery via fibrinolytic ...
Pomara Cristoforo - - 2006
Authors present the case of the sudden death of a 30-year-old man, 3 h since his hospitalization by the onset of aspecific chest pain. ECG findings revealed the presence of localized ST segment elevation in precordial leads (V1-V4) and DII-DII, and aVF mimicking acute antero-inferior myocardial infarction. A diagnosis of ...
Wehr Gabriele - - 2006
AIMS: The conventional 12-lead electrocardiogram (cECG) derived from 10 electrodes using a cardiograph is the gold standard for diagnosing myocardial ischemia. This study tested the hypothesis that a new 5-electrode 12-lead vector-based ECG (EASI; Philips Medical Systems, formerly Hewlett Packard Co, Boeblingen, Germany) patient monitoring system is equivalent to cECG ...
Robinson Christina R - - 2006
In patients who have ST-segment elevation myocardial infarction (STEMI), a patent infarct-related artery on the initial angiogram is associated with improved clinical outcomes, including decreased mortality. The present study assessed the influence of administering aspirin, beta blockers, statins, and angiotensin-converting enzyme inhibitors before STEMI on infarct-related artery patency. Our data ...
Sciagrà Roberto - - 2006
ST-segment resolution is used to classify the response to reperfusion therapy in acute myocardial infarction, but the possibility to predict outcome in individual patients is unclear, particularly in the setting of primary percutaneous coronary intervention (PCI) and abciximab therapy. We studied 213 patients who underwent successful revascularization with PCI. Maximal ...
Dominguez-Rodriguez Alberto - - 2006
C-reactive protein, a marker of inflammation, is increasingly measured to stratify risk for coronary artery disease and guide clinical management. Likewise, a relation has been suggested between decreased nocturnal melatonin levels and coronary artery disease. However, little is known about the association between melatonin and C-reactive protein in patients with ...
Dickens Chris - - 2005
Depression following myocardial infarction is associated with a higher mortality rate. The authors studied 314 patients admitted to the hospital with a first myocardial infarction to assess whether cardiac failure after the infarction, which is also linked to a higher mortality rate, was predicted by psychosocial characteristics present before the ...
Sekulic Milan - - 2005
An algorithm to lower time from first contact in the field by EMS personnel to in-hospital mechanical reperfusion is described. ECG tracings were telemetered via cellular phone to an emergency room physician, who then activated the cardiac catheterization call team to bypass usual delays seen during ER triage. Seventy-one ECGs ...
Sánchez Pedro L - - 2005
PURPOSE OF REVIEW: The goal of treatment strategies for patients with ST elevation myocardial infarction is to reperfuse the occluded coronary artery, as rapidly and safely as possible. This review discusses evidence regarding the appropriate treatment strategy for patients with ST elevation myocardial infarction taking into consideration geographical and logistical ...
Ghaemmaghami Chris A - - 2005
The ECG classification of acute myocardial infarctions has had a profound influence on the treatment of patients with AMI. Deciding whether a patient has ST-segment elevations or a new left bundle branch block or neither of these findings on ECG launches the treating physician down two different treatment pathways: patients ...
Tabas Jeffrey - - 2005
Emergency department (ED) management of patients who present with suspected unstable angina (UA) and non-ST elevation myocardial infarction (NSTEMI) is especially challenging. Therapies that demonstrate benefit in patients who experience proven disease may not be indicated in patients who present with suspected disease. The emergency practitioner must have a clear ...
Karadede Abdulaziz - - 2005
The aim of this study was to investigate the correlation between ECG changes prior to discharge and findings of early low dose dobutamine stress echocardiography (LDSE) performed in 6 +/- 2 days, in patients experiencing their first acute anterior MI. A total of 62 patients admitted with their first acute ...
Cannon Christopher P - - 2005
For patients who have acute coronary syndromes (ACS), risk stratification is key to initiating appropriate treatment. For ST-segment elevation MI, immediate reperfusion therapy is needed, and thus rapid identification of ST elevation on the ECG is critical. Then, having a standardized protocol for rapid treatment- with either primary percutaneous coronary ...
Nabatian Sepideh - - 2005
BACKGROUND: Myocardial ischemia and infarction are rare during pregnancy. Approximately 150 cases of myocardial infarction during pregnancy have been documented in the literature worldwide (predominantly anterior wall). However, elevated troponin levels have been reported in patients with preeclampsia. CASES: We describe 2 patients with preeclampsia who presented with acute myocardial ...
Eskola Markku J - - 2005
Accurate and rapid electrocardiographic interpretation is of crucial importance in acute coronary syndrome (ACS). Computerized electrocardiographic algorithms are often used in out-of-hospital settings. Their accuracy should be carefully validated in ACS, particularly in ST-elevation myocardial infarction. This study evaluated the comparative accuracy of lead-specific computer-based versus manual measurements of the ...
Ikeda Takanori - - 2005
BACKGROUND: Recent studies suggest that the Brugada-type electrocardiogram (ECG) is much more prevalent than the manifest Brugada syndrome. Although invasive electrophysiologic investigations have been proposed as a risk stratifier, their value is controversial, and alternative noninvasive techniques may be preferred. We sought a noninvasive strategy to detect a high-risk group ...
Théroux Pierre - - 2005
The occurrence of an acute coronary syndrome (ACS) represents a dramatic stage in the otherwise relatively slow and progressive course of coronary artery disease, bringing into perspective its life-threatening implications. The modern era of aggressive management of these syndromes was first introduced by the establishment of the coronary care unit, ...
Moye Steven - - 2005
Right ventricular (RV) myocardial infarction most often occurs in the setting of inferior wall myocardial infarction. Right ventricular infarction complicates approximately 25% (range, 20%-60%) of inferior acute myocardial infarction; it is uncommon to quite rare in anterior and lateral wall acute myocardial infarction. With infarction of the RV, the RV ...
Drew Barbara J - - 2005
BACKGROUND: Clinical trials in prehospital electrocardiography have focused primarily on ST elevation myocardial infarction (STEMI). The aims of this study were to determine, in patients presenting to the emergency department with acute coronary syndrome (ACS), the (1) relative frequency of various ACS types and (2) sensitivity of conventional ST-T criteria ...
Campbell Paul T - - 2005
BACKGROUND: Use of intravenous fibrinolytic agents and percutaneous coronary interventions produce the greatest benefit when they are implemented in the first 2 hours after symptom onset. Further delays in the time to treatment typically lead to reduced benefits and poorer outcomes. METHODS: Cabarrus County Emergency Medical Service personnel complete an ...
Uno Yoshihiro - - 2005
1. In the present study, we attempted to clarify whether the antidiabetic drug miglitol, an alpha-glucosidase inhibitor, has a protective effect against anginal ischaemia. We had reported previously that miglitol reduces myocardial infarct size through inhibition of glycogenolysis during ischaemia in rabbits. However, the effect of miglitol on anginal ischaemia ...
Di Diego José M - - 2005
ST-Segment elevation is a common electrocardiogram (ECG) manifestation of acute transmural myocardial ischemia in leads facing the injury. Acute myocardial ischemia involving the right-ventricular (RV) outflow tract is known to induce a Brugada-like ECG. In this paper, we examined the electrophysiological bases for the similarities between the ECG characteristics of ...
Stagmo Martin - - 2005
BACKGROUND: Ambulatory electrocardiogram monitoring (Holter) with ST-analysis as a measure of myocardial ischemia has in populations with coronary heart disease been shown to predict major coronary events: death, myocardial infarction or coronary revascularization. There has, however, been conflicting evidence regarding the usefulness of this technique in identification of healthy subjects ...
Esposito S - - 2005
We report what is to our knowledge the first laboratory experiment that shows the use of a pyramid wavefront sensor to cophase and align segmented mirrors having three degrees of freedom per segment, i.e., piston, tip, and tilt. In the laboratory the iterative alignment procedure reached a wavefront residual error ...
de Winter Robbert J - - 2005
BACKGROUND: Current guidelines recommend an early invasive strategy for patients who have acute coronary syndromes without ST-segment elevation and with an elevated cardiac troponin T level. However, randomized trials have not shown an overall reduction in mortality, and the reduction in the rate of myocardial infarction in previous trials has ...
Sampson Matt - - 2005
A 22-year-old male with cerebral palsy and respiratory failure had acute reversible ST-segment elevation in the inferior leads during acute collapse of the left lung, which resolved with re-expansion of the left lung several hours later. This suggests that major lung actelectasis needs to be added to the group of ...
Hayashi Motonori - - 2005
A 62-year-old woman was struck by lightning while on a mountain and fortunately did not suffer burns or unconsciousness. She stayed at a mountain lodge overnight and was taken to our hospital by helicopter the next day. Upon admission, electrocardiography showed ST segment elevation indicating acute lateral myocardial infarction, and ...
Korantzopoulos Panagiotis - - 2005
Headache represents a rare manifestation of myocardial ischemic pain. It is believed that this clinical symptom results from convergence of heart autonomic fibers with somatic inputs originating from the head. The authors describe for the first time the case of a 73-year-old woman who experienced an acute non-ST-elevation myocardial infarction ...
Ileri Mehmet - - 2005
A case of pericardial hydatid cyst adjacent to the inferoposterial wall of the left ventricle is reported. Significant ST segment elevations in leads D2, D3, aVF, V5, and V6 on surface electrocardiography and sudden onset of severe chest pain mimicked acute inferolateral myocardial infarction. However, cardiac catheterization and coronary angiography ...
Ungi Imre - - 2005
BACKGROUND: Cardioprotection by preconditioning is limited in some animal models of hypercholesterolemia. We studied ischemic preconditioning induced by coronary angioplasty in hypercholesterolemic and normocholesterolemic patients by means of a beat-to-beat analysis of ST segments. METHODS: Thirty coronary disease patients were classified into normocholesterolemic and hypercholesterolemic groups. Intracoronary ECG was recorded ...
Gick Michael - - 2005
BACKGROUND: In acute myocardial infarction, distal embolization of debris during primary percutaneous catheter intervention may curtail microvascular reperfusion of the infarct region. Our randomized trial investigated whether distal protection with a filter device can improve microvascular perfusion and reduce infarct size after primary percutaneous catheter intervention. METHODS AND RESULTS: We ...
Hayashi Takahiro - - 2005
The ventricular septum receives its blood supply from the septal perforators of the left anterior descending (LAD) coronary artery and the right coronary artery. However, when the LAD artery extends to the inferior wall, beyond the apex (so-called wrapped LAD), the ventricular septum near the apex receives blood supply only ...
Foussas Stefanos G - - 2005
The aim of the present study was to evaluate whether an elevated plasma C-reactive protein (CRP) level provides any additional prognostic information to the validated Thrombolysis In Myocardial Infarction (TIMI) risk score in patients with acute coronary syndromes. For this purpose, 1,846 consecutive patients with either acute ST-segment elevation myocardial ...
Ho Paul C - - 2005
The usual large thrombus load encountered in acute ST-elevation myocardial infarctions increases the likelihood for slow-flow or no-reflow during percutaneous coronary intervention. The use of rotational atherectomy in this clinical scenario is usually prohibitive due to the potential for further induction of platelet activation and aggregation by the rotating burr. ...
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