This study was undertaken to determine whether adaptation to 12 months of intense endurance exercise training could alter the relationship between the product of heart rate and systolic blood pressure (double product) and the extent of ischemic ST-segment depression during exercise in patients with coronary artery disease. True (i.e., not symptom-limited) maximum oxygen uptake capacity increase...

To the Editor:—We read the excellent article by Patel and Souter regarding equipment-related electrocardiographic artifacts. We wish to remind readers of ANESTHESIOLOGY that the electrocardiographic monitor itself can also introduce artifacts, e.g., ST-segment depression, in the example described below and documented in figure 1. An asymptomatic 86-yr-old man was scheduled to undergo cataract e...

St. John's Wort scientifically known as Hypericum Perforatum, an herbal remedy generally used to treat depression, is making a rise throughout Europe and the United States. St. John's Wort is a perennial plant that produces abundant yellow flowers and grows naturally throughout much of the world, including specifically in northern California, southern Oregon, and Colorado. It usually flowers on...

Background: The electrocardiography (ECG) is considered as a fundamental tool in identifying the location and managing the symptoms of acute myocardial infarction. The aim of the present study is to study different ECG patterns according to the vessel involved and then it is correlated with the angiographic findings. Methods: It is a prospective and observational study conducted on 50 patients ...

BACKGROUND T-wave abnormalities are common during the acute phase of non-ST-segment elevation acute coronary syndromes, but mechanisms underlying their occurrence are unclear. We hypothesized that T-wave abnormalities in the presentation of non-ST-segment elevation acute coronary syndromes correspond to the presence of myocardial edema. METHODS AND RESULTS Secondary analysis of a previously e...

STUDY OBJECTIVES We sought to assess the incidence of transient U-wave inversion during vasospasm of the left anterior descending coronary artery (LAD) with ST-segment depression as opposed to that with ST-segment elevation. DESIGN Retrospective study. SETTING Cardiology division of acute-care hospitals. PATIENTS We studied 49 patients with vasospastic angina whose vasospasm was induced i...

Eighty-two patients with variant angina underwent a treadmill exercise test using 14 ECG leads, and 67 also underwent exercise thallium-201 scans. The test induced ST elevation in 25 patients (30%), ST depression in 21 (26%) and no ST-segment abnormality in 36 (44%). ST elevation during exercise occurred in the same ECG leads as during spontaneous attacks at rest, and was always associated with...