Cardiologist Job Description

The American College of Cardiology's patient site defines a cardiologist as a doctor with special training and skill in finding, treating and preventing diseases of the heart and blood vessels. In practice that covers an enormous range of work: an outpatient visit for blood pressure and cholesterol in a patient with a family history, a midnight call about a man whose ECG shows an evolving heart attack, and a long conversation with an elderly woman deciding whether her narrowed aortic valve should be replaced.

The core of the job is diagnostic reasoning. A cardiologist sees a patient with breathlessness and has to separate heart failure from lung disease, anemia or deconditioning. A patient with palpitations may have harmless extra beats or atrial fibrillation that raises stroke risk and calls for anticoagulation. The clinical tools are familiar ones: a careful history, a stethoscope, the 12-lead ECG, the echocardiogram, the stress test, and more specialized imaging such as cardiac CT and cardiac MRI when a question cannot be answered at the bedside.

The clinic is where chronic disease gets managed. Heart failure patients need diuretics adjusted, newer drug classes started and stepped up, and kidney function and potassium watched while that happens. Coronary patients need lipid targets, antiplatelet decisions after a stent, and a plan for symptoms that return. Patients on blood thinners need someone to weigh bleeding risk against clot risk every time something changes, from a planned surgery to a fall at home.

Hospital work is faster and sharper. Inpatient cardiology teams handle acute coronary syndromes, heart failure that has decompensated, dangerous rhythms and chest pain that the emergency department could not explain. Consult requests come from surgeons asking whether a patient can safely go to the operating room and from intensivists managing cardiogenic shock. Coordinating with cardiac surgeons, nurses, pharmacists and the primary team is part of every day.

Procedural cardiologists spend much of their week in labs. In the catheterization lab, catheters threaded from the wrist or groin show the coronary arteries on fluoroscopy, and an interventional cardiologist can open a blocked vessel with a balloon and stent during the same procedure. Electrophysiologists map and ablate abnormal rhythm circuits and implant pacemakers and defibrillators. Imaging specialists run the echo lab, read transesophageal studies, and interpret nuclear, CT and MRI scans.

Valve disease brings in the heart team. A patient with severe aortic stenosis or a leaking mitral valve is reviewed jointly by cardiologists and cardiac surgeons, who weigh age, frailty and anatomy before choosing a transcatheter procedure or open surgery. Behind all of it sits documentation, registry reporting and quality review, which cardiologists share with the rest of the service line.

The road to cardiology runs through internal medicine. Candidates earn an MD or DO, complete an internal medicine residency (usually three years), and then match into a cardiovascular disease fellowship. Expect the full path after college to take a decade or more, with subspecialty training adding more.

Fellowship training. The Accreditation Council for Graduate Medical Education sets the rules for cardiovascular disease programs. Its 2025 program requirements fix the fellowship at 36 months and spell out minimum time in each area:

• At least 24 months of clinical experience, including inpatient and special experiences
• Three months in the cardiac catheterization laboratory
• Six months in noninvasive evaluation, including at least three months of echocardiography and three months of cardiac imaging that covers nuclear cardiology, CT and MRI
• Two months devoted to electrophysiology
• Nine months of non-laboratory clinical practice, such as outpatient clinic and consult services

The same document requires each fellow to interpret a minimum of 3,500 electrocardiograms and to demonstrate competence in nuclear cardiology, alongside the management of acute coronary syndromes, heart failure, arrhythmias, valve disease and preoperative cardiac evaluation.

Licensure and certification.

• An unrestricted medical license from the state medical board where you practice
• DEA registration for prescribing controlled substances, issued by the Drug Enforcement Administration
• Board certification in internal medicine, then in cardiovascular disease, from the American Board of Internal Medicine; osteopathic physicians may instead certify through the American Osteopathic Board of Internal Medicine
• Optional subspecialty certification from ABIM in interventional cardiology, advanced heart failure and transplant cardiology, clinical cardiac electrophysiology, or adult congenital heart disease

Cardiologists can also be elected a Fellow of the American College of Cardiology, the FACC after a name, which the College awards based on credentials, achievements and contributions to cardiovascular medicine.

What makes a strong candidate. Strong candidates bring fluency in ECG and echo interpretation, sound judgment about when to send a patient to the cath lab, and comfort with the hemodynamics of shock and severe valve disease. Procedural candidates need logged case volume and good outcomes from their training program. Just as important are the softer skills: explaining a risky procedure in plain language, delivering bad news to a family, and running a heart team discussion without talking over the surgeon.

For a new attending, the typical expectation is a few years of building a clinic panel and earning a place in the call rotation before taking on medical director or lab leadership roles. Academic tracks add grant writing, clinical trial work and fellow teaching to that list.

Workforce projections matter for anyone entering the field. A workforce study published in the Journal of the American Heart Association in 2026, built on the Health Workforce Simulation Model, projected that the supply of cardiologists will grow from 37,000 to 37,730 between 2025 and 2037, a 2.0% increase. The same study projected demand to rise 15.7% over that period, lowering workforce adequacy from 92.2% in 2025 to 81.4% in 2037. The authors found the projected shortages greatest in the West, in certain states, and in nonmetropolitan areas, which is useful information for a fellow weighing a rural or community position against an academic one.

Medicare is also testing payment tied to chronic disease care. The Centers for Medicare and Medicaid Services finalized the Ambulatory Specialty Model, which aims to improve upstream management of chronic disease and is a mandatory model with five performance years running from January 1, 2027, through December 31, 2031. According to the American College of Cardiology, it holds cardiologists who historically treated at least 20 Original Medicare beneficiaries with heart failure, and who practice within selected core-based statistical areas or metropolitan divisions, financially accountable for the management of chronic congestive heart failure. Participants are scored in four categories, cost, quality, improvement activities and improving interoperability, with payment adjustments based on risk-adjusted spending for attributed patients. CMS says the model rewards participants for improving patient outcomes and coordinating with primary care providers, and it has posted the final participant list for the 2027 performance year.

On artificial intelligence, the ACC's policy principles on clinical AI note that the FDA had cleared more than 200 AI algorithms used in direct cardiovascular patient care as of March 2026, including algorithms used in cardiac imaging. The College's position is that these tools should augment the clinician's work and decision-making, not replace it, and that liability for AI outputs should be clearly assigned so clinicians are not held responsible for system-level failures. For a working cardiologist, that means learning to audit an algorithm's flag, knowing when it is wrong, and documenting the reasoning behind the final call.

The subspecialty decision shapes the rest of a career. Interventional cardiology and electrophysiology are built around procedures and call. Advanced heart failure links to transplant programs and mechanical circulatory support. General and noninvasive cardiologists carry the clinic, imaging and consult load that keeps the procedural services fed. Each path asks for different training years, different hours and a different practice setting, so fellows benefit from rotating through the options early.

Employment settings range from large health systems and academic medical centers to independent cardiology groups, hospital-employed practices and the Veterans Health Administration. Compensation models differ just as widely, from salary plus quality incentives to productivity formulas tied to work RVUs, so Medicare's annual fee schedule rules can affect what cardiologists earn.

Dear Dr. Okafor,

I am writing to apply for the general cardiology position with Riverbend Heart Associates. I will complete my cardiovascular disease fellowship at Lakeshore University Medical Center this June and plan to sit for the ABIM cardiovascular disease examination in the fall.

My fellowship gave me a balanced foundation. I carried a continuity clinic for all three years, which taught me how much of heart failure care happens between visits: the phone call about weight gain, the lab check after a dose change, the conversation with a daughter who manages her father's pills. On the inpatient side I led the consult service during my senior year and became the fellow the surgical teams called first for preoperative evaluations.

Echocardiography is where I spent my elective time. I am comfortable reading transthoracic and transesophageal studies, and I helped our lab revise its protocol for flagging patients with newly reduced ejection fraction so they reach a heart failure clinic within days rather than waiting for their next routine visit.

One patient shaped how I practice. A retired machinist was admitted three times in a year for what was labeled a COPD flare. When I reviewed his echo and right heart catheterization data together, the pattern pointed to severe aortic stenosis with low flow. After a heart team review he had a transcatheter valve, and he now walks his dog every morning. That case taught me to question the label on the chart.

Riverbend's model, with its strong outpatient base, an active echo lab and a regional referral network, is the setting where I believe I can contribute from the first week. I would welcome the chance to talk about your group's needs.

Sincerely, Jordan Ellis, MD