Stroke in the Time of Circadian Medicine

Philipp Mergenthaler1,2,3,4, Joyce S Balami3,4, Ain A Neuhaus3,5,4

  • 1Center for Stroke Research Berlin (P.M., A.M.B.), Charité - Universitätsmedizin Berlin, Germany.

Circulation Research
|March 14, 2024
PubMed

Insights

Circadian rhythms, the body's internal clock, significantly impact stroke severity and outcomes. Understanding this link is crucial for developing effective stroke and dementia treatments.

Area of Science:

  • Chronobiology
  • Neurology
  • Vascular Biology

Background:

  • Time-of-day influences stroke incidence and severity.
  • Circadian rhythms affect stroke risk factors and clinical outcomes.
  • Growing evidence links circadian biology to cerebrovascular disease.

Purpose of the Study:

  • To review the interplay between chronobiology and cerebrovascular disease.
  • To explore circadian regulation of stroke and vascular dementia pathophysiology.
  • To present clinical evidence on disrupted circadian rhythms and neurological disease.

Main Methods:

  • Comprehensive literature review.
  • Discussion of circadian control over cellular mechanisms (cell death, metabolism, mitochondrial function, inflammation).
  • Analysis of clinical data linking circadian disruption to stroke and dementia.

Main Results:

  • Circadian rhythms regulate key pathophysiological processes in stroke and dementia.
  • Disrupted circadian rhythms are associated with increased susceptibility to stroke and dementia.
  • Specific circadian phases may influence stroke damage and treatment efficacy.

Conclusions:

  • Circadian biology is vital for understanding stroke and vascular dementia.
  • Chronotype may be a key factor in precision stroke treatment.
  • Further research into chronobiology can optimize therapeutic strategies for cerebrovascular diseases.

Related Concept Videos

Regulation of Stroke Volume01:27

Regulation of Stroke Volume

The regulation of stroke volume, which is the amount of blood the heart pumps out during each heartbeat, is critical for maintaining a healthy circulatory system. Stroke volume is influenced by three main factors: preload, contractility, and afterload.
Preload refers to the degree of stretch on the heart before it contracts. It's analogous to the stretching of a rubber band; the more it's stretched, the more forcefully it snaps back. This concept is encapsulated in the Frank-Starling law of the...
3.2K
Chronopharmacokinetics: Circadian Rhythms and Influence on Drug Response01:15

Chronopharmacokinetics: Circadian Rhythms and Influence on Drug Response

Circadian rhythms are cyclic changes that are crucial in plasma drug concentrations. Various standard circadian parameters, including core body temperature, heart rate, and other cardiovascular factors, directly impact disease states and the therapeutic response to drug therapy.
The time of drug administration is an important factor to consider, as it can influence the toxic dose of a drug. For example, a study conducted by Prins et al. in 1997 examined the effects of the timing of...
61
Pulse rhythm01:30

Pulse rhythm

Pulse rhythm refers to the pattern of pulsations within specific intervals, offering valuable insights into the regularity or irregularity of the heart's beats as observed through the pattern of pulsation within specific intervals. A regular pulse exhibits a consistent heart rate with uniform waveforms and pulsation force, variations of which can be classified as normal, weak, or bounding.
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac...
796
Blood Pressure Imbalances and Circulatory Shock01:24

Blood Pressure Imbalances and Circulatory Shock

Disorders affecting blood volume, vascular tone, or vascular function can disrupt vascular homeostasis, including conditions like hypertension, hemorrhage, and shock.
Blood Pressure: Hypertension and Hypotension
Normal blood pressure is 120/80 mm Hg. Elevated blood pressure is 120-129/under 80 mm Hg. Hypertension, warranting treatment at 130/80 mm Hg, is often asymptomatic and can lead to severe cardiovascular events, aneurysms, peripheral arterial disease, chronic renal disease, or cardiac...
773
Pulse01:16

Pulse

When the heart pumps blood out, arterial elastic fibers play a crucial role in sustaining a high-pressure gradient. They expand to accommodate the received blood and then recoil - a process known as the pulse that can be either manually palpated or electronically quantified. Despite a reduction in its effect with increased distance from the heart, elements of the pulse's systolic and diastolic components persist, observable even at the arteriole level.
The pulse serves as a clinical...
510
Cardiac Output II: Effect of Stroke Volume on Cardiac Output01:22

Cardiac Output II: Effect of Stroke Volume on Cardiac Output

Cardiac output (CO), the amount of blood the heart pumps per minute, is a parameter in cardiovascular physiology determined by stroke volume and heart rate. Stroke volume, the amount of blood pushed from one of the ventricles per heartbeat, is influenced by preload, afterload, and contractility.
Preload
Preload refers to the initial elongation of the cardiac myocytes before contraction and is related to the volume of blood filling the heart at the end of diastole, or end-diastolic volume. The...
895