Skip to main content
All articles

For Patients

What to Expect as a Patient in a Cardiovascular Clinical Trial

By Pedro Martinez-Clark, MD, FACC Published February 26, 2026 Updated April 25, 2026 3 min read

Patients often tell us they wish they had known what participation in a clinical trial actually looks like — week to week — before they signed up. Here is a plain-language walk-through.

Step 1 — Initial contact and pre-screen

After you contact our team (or are referred by your physician), a coordinator will call you for a brief pre-screen. We ask about your diagnosis, medications, prior procedures, and other key health information to see which active trials may fit.

Step 2 — Screening visit

If a trial may be a good match, we schedule a screening visit. This typically includes a focused history and physical exam, an ECG, lab work, and (depending on the protocol) imaging such as echocardiogram or vascular ultrasound.

Before any study-specific procedures, you go through informed consent. The investigator and coordinator review the study purpose, what is involved, possible risks and benefits, alternatives, and your rights as a participant. You can take the document home, discuss it with family, and ask questions before signing. Consent is available in English and Spanish.

Step 4 — Baseline visit and randomization

Once you qualify and consent, you complete any final baseline assessments. In randomized studies, an electronic system assigns you to a treatment arm. Many trials are double-blind — meaning neither you nor the team knows your assignment until the trial is unblinded.

Step 5 — Treatment phase

You receive the study drug or device and attend follow-up visits according to the protocol's schedule. Visits typically include vitals, lab work, ECGs, symptom questionnaires, and the study team is available between visits if you have concerns.

Step 6 — End-of-study and long-term follow-up

At the end of the active treatment period, you complete an end-of-study visit. Some trials include long-term follow-up by phone or short visits to track durability and safety. Your treating cardiologist receives a summary if you wish.

What costs are involved?

Study drug, study-related procedures, and protocol-required visits are typically provided at no cost. Many trials offer compensation for time and travel, set in advance and disclosed in the consent form.

Can I stop participating?

Yes. You can withdraw from a clinical trial at any time, for any reason, without affecting your future medical care.

References

Frequently asked questions

What happens at a clinical trial screening visit?

A screening visit typically includes a focused history and physical, ECG, lab work, and protocol-specific imaging such as echocardiogram or vascular ultrasound.

What is informed consent?

Informed consent is a written and verbal review of the study's purpose, procedures, risks, benefits, alternatives, and your rights. You may take the document home, ask questions, and decide without pressure.

Will I know which treatment I am receiving?

It depends on the trial. Many studies are double-blind, meaning neither you nor the study team knows your assignment until the study is unblinded. Open-label trials disclose the assignment.

Are clinical trial visits paid?

Many trials offer compensation for time and travel, disclosed in the informed consent form. Study-related care is typically provided at no cost.

Can I stay with my regular cardiologist while in a trial?

Yes. Your regular cardiology and primary care relationships continue. With your permission, we share study summaries with them.

What if I have side effects between visits?

Contact the study team immediately. Coordinators are available between visits, and the investigator is on call for safety concerns.

Reviewed by Pedro Martinez-Clark, MD, FACC · Last updated April 25, 2026. This article is general health education and is not medical advice. Always discuss treatment decisions with your physician.