Haemodynamic response to myocardial ischaemia during unrestricted activity, exercise testing, and XXXX assessed by ambulatory pulmonary artery pressure monitoring.

@entity1 @entity662 @entity308 @entity951 @entity955 @entity158 @entity453
Ambulatory pulmonary artery pressure monitoring by means of a transducer tipped catheter with a simultaneous frequency modulated electrocardiogram and a miniaturised tape recorder was used to study the haemodynamic implications of @entity308 in @entity1 with @entity453 . Nineteen male @entity1 (mean (SD) age 58 (11) years) with clinical and angiographic evidence of @entity453 were studied together with six controls. Changes in the ST segment and pulmonary artery diastolic pressure during treadmill exercise, @entity955 , and unrestricted ambulant activity were analysed. During exercise, pulmonary artery diastolic pressure rose significantly in @entity1 with @entity453 but not in the controls. One @entity1 with ST @entity308 greater than 1 mm did not have a rise in pulmonary artery diastolic pressure on exercise; two had a rise in pulmonary artery diastolic pressure with no ST segment change despite severe @entity951 . The pulmonary artery diastolic pressure tended to rise before or simultaneously with the onset of @entity308 . The haemodynamic response to @entity955 was similar in normal controls and @entity1 with @entity453 . During ambulatory monitoring there were 29 episodes of @entity308 all of which were associated with a rise in pulmonary artery diastolic pressure and @entity662 . The onset of @entity308 occurred before a rise in pulmonary artery diastolic pressure in 11 episodes, was simultaneous with it in 11, and followed it in seven episodes. During exercise and ambulatory monitoring there was a correlation between the magnitude of @entity308 and the rise in pulmonary artery diastolic pressure. @entity158 was a late feature during exercise, @entity955 . This technique for the first time allows the relation between ST segment changes and haemodynamic alterations in left ventricular function to be assessed in ambulant @entity1 with @entity453 .
