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Two types of left ventricular wall motion abnormalities with distinct clinical features in patients with hypertrophic

S Ishiwata1, S Nishiyama, S Nakanishi

  • 1Cardiovascular Center, Toranomon Hospital, Tokyo, Japan.

European Heart Journal
|December 1, 1993
PubMed

Insights

Hypertrophic cardiomyopathy (HCM) patients can develop left ventricular (LV) wall motion abnormalities. Two distinct patterns emerged, suggesting different underlying mechanisms for these HCM complications.

Area of Science:

  • Cardiology
  • Cardiovascular Research
  • Medical Science

Background:

  • Hypertrophic cardiomyopathy (HCM) can lead to left ventricular (LV) wall motion abnormalities.
  • These abnormalities may develop over time without coronary artery disease.
  • Understanding predictors and mechanisms is crucial for patient management.

Purpose of the Study:

  • To investigate the incidence, mechanisms, and predictors of LV wall motion abnormalities in HCM patients.
  • To identify clinical features influencing the gradual development of these abnormalities.
  • To differentiate between distinct patterns of LV dysfunction in long-term HCM follow-up.

Main Methods:

  • Retrospective analysis of 162 HCM patients with an average follow-up of 13.3 years.
  • Focused on 16 patients who developed LV wall motion abnormalities.
  • Categorized abnormalities into apical segmental dysfunction with obstruction and generalized hypokinesis.

Main Results:

  • Two distinct patterns of LV wall motion abnormalities were identified.
  • 11 patients showed apical dysfunction with midzone obstruction, linked to extensive apical hypertrophy.
  • Five patients developed generalized hypokinesis, with initial LV contractility decrease.

Conclusions:

  • HCM patients can develop distinct forms of LV wall motion abnormalities.
  • Apical hypertrophy and initial LV dysfunction predict different abnormality patterns.
  • These patterns suggest different underlying pathophysiological mechanisms in HCM progression.

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