The syndrome of inferior non-infarctional Q-waves due to segmental basal left ventricular hypertrophy

Area of Science:

• Cardiology
• Electrophysiology
• Cardiovascular Imaging

Background:

• Non-infarctional Q-waves are frequently observed in electrocardiograms (ECGs).
• These Q-waves are associated with diverse conditions such as axis shifts, accessory pathways, pregnancy, and hypertrophic cardiomyopathy (HCM).
• The precise nosological nature of some HCM-like segmental left ventricular (LV) hypertrophic states remains incompletely understood.

Purpose of the Study:

• To review the current literature on non-infarctional inferior Q-waves.
• To explore their association with segmental basal LV hypertrophies, particularly those related to HCM.
• To discuss varying opinions on the nature of these hypertrophic states and suggest future research directions.

Main Methods:

• Focused literature review.
• Analysis of existing studies and case reports.
• Discussion of current understanding and diagnostic challenges.

Main Results:

• Inferior Q-waves in ECGs can be linked to specific patterns of basal LV hypertrophy.
• Hypertrophic cardiomyopathy (HCM) is a significant cause of such Q-waves.
• Other poorly characterized basal segmental LV hypertrophies also present with these ECG findings.

Conclusions:

• Inferior Q-waves may indicate underlying basal LV hypertrophy, notably in HCM.
• Further research is crucial for the pathogenetic characterization of these hypertrophic states.
• Clarifying the nature of these conditions is essential for accurate diagnosis and management.