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Left ventricular pressure responses in post-angiographic angina
Insights
Patients with coronary heart disease experiencing angina after left ventricular cineangiography show increased left ventricular end-diastolic pressure. This suggests myocardial ischemia, prompting medical attention for elevated pressures post-procedure.
Area of Science:
- Cardiology
- Cardiovascular Physiology
Background:
- Coronary heart disease (CHD) patients may experience angina pectoris.
- Left ventricular cineangiography is an invasive diagnostic procedure.
- Understanding hemodynamic changes during and after cineangiography is crucial for patient management.
Purpose of the Study:
- To compare hemodynamic alterations in patients with post-angiographic angina versus spontaneous angina and asymptomatic controls.
- To identify pressure changes indicative of myocardial ischemia during left ventricular cineangiography.
Main Methods:
- Hemodynamic monitoring of left ventricular end-diastolic pressure and dp/dt in patients undergoing left ventricular cineangiography.
- Comparison between three groups: post-angiographic angina, spontaneous angina, and asymptomatic controls.
Main Results:
- Patients with post-angiographic angina exhibited a significantly greater increase in left ventricular end-diastolic pressure compared to other groups.
- No significant change in dp/dt was observed in patients with post-angiographic angina.
- A rise in end-diastolic pressure exceeding 20 mmHg post-cineangiography was associated with myocardial ischemia.
Conclusions:
- Post-angiographic angina is linked to increased left ventricular end-diastolic pressure, likely due to contrast-induced preload and anginal ventricular dysfunction.
- Elevated end-diastolic pressure post-left ventricular cineangiography serves as a critical alert for potential myocardial ischemia.
Abstract:
Alterations in left ventricular end-diastolic pressure and in dp/dt observed in ten patients with coronary heart disease who developed angina pectoris following left ventricular cineangiography were compared with those of six other patients who developed angina spontaneously and with patients who underwent left ventricular cineangiography without experiencing angina. In the patients with post-angiographic angina there was a greater increase in end-diastolic pressure than that seen in the other patients, but there was no significant change in dp/dt. Changes in left ventricular pressure associated with post-angiographic angina would appear to reflect the combined effects of increased preload provided by the contrast material and of ventricular dysfunction including diminished compliance associated with angina. A rise in end-diastolic pressure greater than 20 mmHg following left ventricular cineangiography should alert the physician that the patient may be having myocardial ischemia.