Heart-Brain axis: is microvascular dysfunction the link between stroke and Takotsubo syndrome?

Area of Science:

• Cardiology
• Neurology
• Vascular Biology

Background:

• Takotsubo syndrome (TS) involves transient left ventricular dysfunction, often stress-induced.
• The brain-heart axis is increasingly recognized as crucial in TS pathogenesis.
• A significant association exists between TS and cerebrovascular events, especially ischemic stroke.

Purpose of the Study:

• To investigate shared pathophysiological mechanisms linking TS and stroke.
• To emphasize microvascular dysfunction as a common factor in both conditions.
• To explore the role of the heart-brain axis and advanced imaging in understanding these links.

Main Methods:

• Review of current evidence on TS and stroke pathophysiology.
• Analysis of the role of the brain-heart axis and microvascular dysfunction.
• Emphasis on the utility of advanced imaging techniques for detecting microvascular abnormalities.

Main Results:

• Shared mechanisms of microvascular impairment affect both the heart and brain in TS patients.
• Stroke incidence in TS patients is 1-2% per patient-year, linked to autonomic and microvascular dysfunction.
• Advanced imaging is vital for identifying interconnected microvascular dysfunction across the heart-brain axis.

Conclusions:

• TS and stroke may share common pathophysiological pathways centered on microvascular dysfunction.
• Understanding these interconnected mechanisms is crucial for early detection and novel therapeutic strategies.
• Targeting both cardiac and cerebral microvascular health could improve outcomes for TS patients.