The Cardiovascular Research Foundation® welcomes physicians and
other health care professionals from around the globe.
Please familiarize yourself with U.S. entry requirements that apply to you.
Letter of Invitation
CRF® will gladly send you a letter of invitation to attend Fellows™ Course 2026. The official letter of invitation can be used to facilitate processing visas or other documents you need to attend the course.
Please note, a letter of invitation:
- Does not signify CRF financial support or commitment.
- Does not guarantee acceptance of your application to attend Fellows Course 2026.
- Does not guarantee that you will secure an entry visa.
Supplementary Information for Your Visa Application
You may want to consider including the following with your application for a U.S. entry visa:
- A letter from CRF inviting you to speak or accepting your abstract, if applicable.
- A letter from your institution, training director, or employer stating you have been given time to attend Fellows Course 2026 and are expected back at your place of employment on a specific date. The name on the letter must exactly match the name on your passport.
- Documentation of your Fellows Course 2026 registration, such as registration ID, hotel confirmation, and flight information. The name on your reservations must exactly match the name on your passport.
CRF cannot intervene with the U.S. Embassy or U.S. State Department on your behalf.
Check Your Passport Before Booking Travel
If your passport is expired or due to expire soon, please be sure to renew it before your trip. Visitors to the United States are typically required to be in possession of a passport that is valid for six months beyond the period of their intended stay.
Supplementary Information for Your Visa Application
You may want to consider including the following with your application for a U.S. entry visa:
- A letter from CRF inviting you to speak or accepting your abstract, if applicable.
- A letter from your institution, training director, or employer stating you have been given time to attend Fellows Course 2026 and are expected back at your place of employment on a specific date. The name on the letter must exactly match the name on your passport.
- Documentation of your Fellows Course 2026 registration, such as registration ID, hotel confirmation, and flight information. The name on your reservations must exactly match the name on your passport.
CRF cannot intervene with the U.S. Embassy or U.S. State Department on your behalf.
Visa Information
If you need an entry visa, please visit your nearest U.S. Embassy or Consulate to obtain the necessary documents — and please plan in advance to allow enough time for the visa to be processed. Visit the U.S. Department of State website for information on the visa application process.
Applications for visas have taken as long as 90 days to process. You must contact your local consulate as soon as possible about the application process for entry into the United States if you are not a U.S. citizen or lawful permanent resident.
Please view the resources linked below for the most current and accurate information for planning your travel to the United States.
Visa Information Resources
How To Apply for a Visa — U.S. Department of State
Locations of U.S. Embassies and Consulates
Visa Waiver Program (VWP) — U.S. Department of State
Visa Waiver Program requirements — U.S. Department of Homeland Security
ESTA — U.S. Department of Homeland Security
Travel Document Requirements — U.S. Department of Homeland Security

