[The apexcardiogram in acute myocardial infarct]
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Insights
Apicocardiogram (ACG) effectively assesses myocardial performance in acute myocardial infarction patients, even without evident heart failure signs. It detects changes in intracardiac hemodynamics, aiding early diagnosis and management.
Area of Science:
- Cardiology
- Medical Imaging
- Physiology
Context:
- Acute myocardial infarction (AMI) presents diagnostic challenges.
- Assessing intracardiac hemodynamics is crucial for managing AMI.
- Early detection of myocardial dysfunction is vital for patient outcomes.
Purpose:
- To elucidate the relationship between intracardiac hemodynamics and apicocardiogram (ACG) parameters in AMI patients.
- To evaluate the utility of ACG in identifying myocardial performance changes.
- To correlate ACG findings with clinical and radiological signs of cardiac insufficiency.
Summary:
- ACG parameters, including A wave, A/H ratio, and RIV, showed significant increases, while total expulsion decreased in AMI patients, especially those with clinical insufficiency.
- ACG data were less reliable for assessing myocardial contractility in the pre-expulsive stage without manifest insufficiency.
- ACG demonstrated potential in evaluating myocardial performance changes even in the absence of clinical or radiological signs of decompensation.
Impact:
- ACG can serve as a valuable tool for assessing myocardial performance in AMI.
- This study highlights ACG's role in detecting subclinical cardiac dysfunction.
- Findings may improve early diagnosis and management strategies for acute myocardial infarction.
Abstract:
The relation between intracardial haemodynamics and apicocardiogram (ACG) parameters is explained. A wave (amplitude and duration), A/H ratio, true and total TCI, total systole, total expulsion, RIV, RFW, TE/TCI (total) and TE/TCI (true) findings in 22 patients with acute myocardial infarct are presented. Attention is also given to clinical and radiological signs of cardiac insufficiency and the infarct site. Constant and significant increases in the A wave, A/H ratio and RIV, together with a decrease in total expulsion, were noted, particularly in cases with clinical evident insufficiency. In the pre-expulsive stage, ACG Data could not be taken as a reliable index of myocardial contractility in cases where insufficiency was not manifest. It is felt, therefore, that ACG may be of assistance in the evaluation of changes in myocardial performance, even where clinical and radiological signs of decompensation are absent.