Archive for the 'Coronary Artery Calcification' Category

31 Jul

Exercise Tolerance in Asymptomatic Elderly Men With Fluoroscopically Detected Coronary Artery Calcification: Conclusion

A subject’s sensitivity to gas exchange abnormalities, when added to ECG recording during exercise testing, is not known. However, maximal exercise capacity would be expected to be reduced if the degree of exercise-induced ischemia is of sufficient magnitude to impair the function of the cardiac pump, even in asymptomatic subjects. Because of limited activity, many […]

29 Jul

Exercise Tolerance in Asymptomatic Elderly Men With Fluoroscopically Detected Coronary Artery Calcification: Outcome

Recently, the gas exchange response to exercise has been applied widely for a measurement of the functional capacity of the cardiovascular system. Cardiovascular dysfunction should be reflected in an imbalance in the supply and demand of oxygen under exercise stress, because the cardiovascular system has a central role in supporting cellular respiration. In a normal […]

27 Jul

Exercise Tolerance in Asymptomatic Elderly Men With Fluoroscopically Detected Coronary Artery Calcification: Discussion

In contrast to what we expected to find, CAC, as detected by digital subtraction fluoroscopy, did not identify those subjects with impaired exercise tolerance due to CAD in asymptomatic men 50 years of age and older. The deposition of calcium in coronary arteries is an indicator of the age of the atheroma. CAC detected by […]

25 Jul

Exercise Tolerance in Asymptomatic Elderly Men With Fluoroscopically Detected Coronary Artery Calcification: Results

No subject had chest pain or an abnormal BP response during the test period. Only one subject with CAC had exercise-induced ST segment depression, and that subject stopped exercising due to leg fatigue without chest pain. The average values, given as percentages of the predicted values for the cardiorespiratory parameters of the two groups combined […]

23 Jul

Exercise Tolerance in Asymptomatic Elderly Men With Fluoroscopically Detected Coronary Artery Calcification: Criteria of Abno rmal Response

Criteria of Abno rmal Response Three experienced observers, blinded to the CAC data, used the following criteria in the assessment of the exercise tests: Positive ST depression was defined as horizontal or downsloping ST segment depression >0.1 mV at 80 ms after the J point in at least one ECG lead and lasting for > […]

21 Jul

Exercise Tolerance in Asymptomatic Elderly Men With Fluoroscopically Detected Coronary Artery Calcification: Parameters of Cardiovascular Function

The 12-lead ECG was continuously monitored (ELI-XR; Mortara Instruments; Milwaukee, WI) and was recorded every minute at a paper speed of 25 mm/s. The ST segment trend of each lead was obtained after the study. HR was also continuously monitored using a CC5 lead configuration. Brachial arterial BP was measured every minute by auscultation using […]

19 Jul

Exercise Tolerance in Asymptomatic Elderly Men With Fluoroscopically Detected Coronary Artery Calcification: Exercise Protocol

A score of at least 2 (definitely containing calcific deposits) defined CAC. Any calcification in the distribution of any coronary artery defined an abnormal study. This method had been shown to have good interstudy reliability and interobserver reproducibility. The prevalence of calcific deposits in at least one major coronary artery was 62.0% in this study […]

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