As a nutritional scientist and educator, I spend a lot of time thinking about the heart through a lens of physiology, metabolism, and medicine. I aim to reduce risk for cardiovascular disease by sharing evidence-based nutritional strategies. As a human, I realize an equally dangerous health risk can begin in one’s emotional heart. We are hardwired for connection. In this regard, the heart seems simultaneously the strongest and most fragile organ we carry.
Strength
A single heartbeat floods the body with oxygenated blood, refreshing thirsty cells with oxygen while removing carbon dioxide. A heartbreak can flood the body with pain just as quickly. Physiologically, this is a mire of stress hormones, cortisol and epinephrine coupled with dopamine depletion, plus vagal nerve stimulation, a visceral gut punch of emotionally charged, physical pain that can trigger anxiety. The heart is a metabolic glutton; the strength it sustains is reflective of the constant energy supply it requires to maintain its rhythmic force. So, the physiological fallout of heartbreak, betrayal, loss, or grief is significant; it can hijack the nervous system and manifest as extreme fatigue.
Fragility
Ischemia progressively damages cardiac tissue. Half an hour is a threshold for permanent cellular injury; irreversible damage accumulates beyond the point of reperfusion. Likewise, blocked human connection is a progressive thief that can lead to internal, emotive injuries across time: withdrawal, loneliness, and isolation. Atherosclerotic plaque narrows the lumen of coronary arteries, limiting the flow of life-sustaining blood. Chronic emotional isolation narrows one’s capacity for relationships, platonic or romantic.
These opposing forces create an internal cardiological immune system of sorts, where boundaries function as antibodies; acceptance serves as the resolution phase. If a heart remains on high alert, primed by early trauma, abandonment, or rejection, it can tip into a maladaptive defense pattern; protective at first, destructive over time. We may close off to survive, indirectly attacking the very connections sought. And it is understandable, really. The heart is encased in a tough, double-walled sac called the pericardium. Constrictive pericarditis occurs when this sac becomes rigid; the heart literally cannot completely expand, losing capacity to fill with blood. Emotionally, thickened walls can prevent the capacity to acknowledge or receive kindness.
In a healthy system, antibodies discern self from non-self. Boundaries (antibodies, in this metaphor) act as natural guardrails that reciprocally protect autonomy in healthy relationships. Transparent trust is built across time through consistency. In autoimmunity, the discernment between self and non-self becomes lost. Perhaps vulnerability is recognized as a pathogen. A massive inflammatory response could be mounted against emotional intimacy. These defense mechanisms, intended to keep us safe and free from pain, become barriers that degrade one’s ability to truly connect with others.
After cardiac injury, the heart heals through restructuring, or remodeling. Healing requires a conducive environment: nourishment, hydration, rest, and down-regulation. This occurs in phases and involves the generation of scar tissue, enlargement, and compensation. Ultimately, it can be maladaptive for cardiac function across time. This is why follow-up care, surveillance, and a healthy lifestyle after any cardiac event is imperative. Self-acceptance, self-love, stillness, and accepting support of friends and family are helpful aspects following heartbreak and transitions. Kindness is a systemic anti-inflammatory, gratitude an anesthetic for loneliness. Love can be both a suture and a salve when the source is within and a heart remains open.
Sara Police is a nutritional scientist.
