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[Evolution of diastolic polycardiographic indicators in hypertrophic cardiomyopathy]
I Rejman-Praszkiewicz1, B Puzio, M Tendera
1II Katedry i Kliniki Kardiologii Sl. Ak. Med., Zabrzu.
Insights
Hypertrophic cardiomyopathy patients often show prolonged isovolumetric relaxation time (IVRT) and increased apexcardiogram a wave ( %a). These indicators correlate with disease progression and left ventricular pressure.
Area of Science:
- Cardiology
- Cardiovascular Physiology
- Biomedical Engineering
Context:
- Hypertrophic cardiomyopathy (HCM) is a complex cardiac condition.
- Assessing diastolic function is crucial for managing HCM.
- Polycardiographic and hemodynamic indices offer insights into cardiac mechanics.
Purpose:
- To investigate changes in polycardiographic and hemodynamic indices in patients with hypertrophic cardiomyopathy.
- To evaluate the relationship between specific indices and disease characteristics, including obstructive patterns and clinical progression.
Summary:
- In 26 HCM patients, 88% exhibited prolonged isovolumetric relaxation time (IVRT), and 92% showed increased apexcardiogram a wave (%a).
- Obstructive HCM featured significantly prolonged corrected left ventricular ejection time compared to non-obstructive types.
- A significant correlation was found between %a and end-diastolic left ventricular pressure, suggesting a link to diastolic filling pressures.
Impact:
- Findings highlight the potential of IVRT and %a as non-invasive markers for HCM assessment.
- The study suggests these indices may help monitor disease progression and response to therapy.
- Understanding these hemodynamic changes can inform clinical management strategies for hypertrophic cardiomyopathy.
Abstract:
In a group 26 patients with hypertrophic cardiomyopathy the values of certain polycardiographic and haemodynamic indices and their changes in the prolongation of the time of isovolumetric relaxation (IVRT) was noted in 23 patients (88%), with increased value of the percent of the a wave participation of the apexcardiogram (%a) in 24 patients (92%). In the obstructive type the corrected time of left ventricular ejection was significantly prolonged (p < 0.01) in relation to the non-obstructive type. No difference was observed in the values of these parameters depending on the functional class. A weak but significant correlation was demonstrated between the %a and the end-diastolic left ventricular pressure (r = 0.579, p < 0.01). The IVRT value showed an increasing tendency in this prospective study, particularly in patients with progression of clinical symptoms.