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Published on: June 21, 2016
Acute and Subacute Triggers of Cardiovascular Events
Bryan G Schwartz1, Robert A Kloner2, Morteza Naghavi3
1Aurora Cardiovascular Services, Aurora Sinai/Aurora St. Luke's Medical Centers, University of Wisconsin School of Medicine and Public Health, Milwaukee, Wisconsin; and UPMC Hamot, Heart and Vascular Institute, Erie, Pennsylvania.
Insights
Identifying triggers for cardiovascular (CV) events can help high-risk patients avoid them. Early recognition and management of triggers like adrenergic stress or infections are crucial for preventing CV events.
Area of Science:
- Cardiology
- Preventive Medicine
- Immunology
Background:
- Predicting short-term cardiovascular (CV) events and intervening proactively remains a significant challenge in cardiology.
- Nonspecific triggers, common in daily life, have been identified as potential initiators of CV events.
- Understanding the temporal link between triggers and CV events offers a window for intervention in vulnerable patients.
Purpose of the Study:
- To review the literature on the epidemiology and pathophysiology of CV event triggers.
- To identify specific triggers and their time course in precipitating CV events.
- To inform strategies for preventing CV events in high-risk populations.
Main Methods:
- Literature review of studies on cardiovascular event triggers.
- Analysis of the temporal relationship between triggers and CV event onset.
- Examination of the pathophysiology of adrenergic, immune, and inflammatory triggers.
Main Results:
- Adrenergic triggers can lead to CV events within minutes to hours.
- Immune or inflammatory triggers, such as infections, may precipitate events days to weeks later.
- High-risk atherosclerotic patients are particularly vulnerable to these triggers.
Conclusions:
- Healthcare providers should counsel high-risk patients on trigger avoidance and protective measures.
- Patients experiencing symptoms after exposure to triggers should seek immediate emergency care.
- Clinical trials investigating trigger-targeted prevention and intervention strategies are warranted.
Abstract:
Inability to predict short-term cardiovascular (CV) events and take immediate preemptive actions has long been the Achilles heel of cardiology. However, certain triggers of these events have come to light. Although these triggers are nonspecific and are part of normal life, studying their temporal relationship with the onset of CV events provides an opportunity to alert high-risk atherosclerotic patients who may be most vulnerable to such triggers, the "vulnerable patient". Herein, we review the literature and shed light on the epidemiology and underlying pathophysiology of different triggers. We describe that certain adrenergic triggers can precipitate a CV event within minutes or hours; whereas triggers that elicit an immune or inflammatory response such as infections may tip an asymptomatic "vulnerable patient" to become symptomatic days and weeks later. In conclusion, healthcare providers should counsel high-risk CV patients (e.g., in secondary prevention clinics or those with coronary artery Calcium >75th percentile) on the topic, advise them to avoid such triggers, take protective measures once exposed, and seek emergency care immediately after becoming symptomatic after such triggers. Furthermore, clinical trials targeting triggers (prevention or intervention) are needed.
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