Age: 67.0
Sex: M
Vaccine: CHIK, CHIK
Symptoms: Myalgia, Pyrexia, Tachycardia
Clinical narrative: Tachycardia (sustained HR of 150-160s over multiple days); Fever; Heart Palpitations; Atrial Flutter; Aches; Weakness; Myalgia; The following information received from nurse on 24 Oct 2024.   A vaccinee (no identifiers provided) received a dose of IXCHIQ (prevention of disease caused by Chikungunya virus (CHIKV), batch number not provided) on 07 Oct 2024.  On an unknown date the vaccinee experienced Tachycardia (sustained HR of 150-160s over multiple days), fever, heart palpitations as well as atrial flutter, which lead to hospitalisation on 14 Oct 2024.  The reporter stated that the vaccinee has no medical history of cardiac diagnosis before and that the cardiologists presumption is that the vaccination with IXCHIQ is the cause of the new diagnosis and symptoms.  The individual was started on metoprolol, a beta blocker, to manage their cardiac symptoms.  An outcome was not provided. Follow up was initiated.  ---  Follow up information 1 was downloaded from VAERS official webpage on 04 Nov 2024 and also received from a nurse on 05 Nov 2024.  A 67-year-old male received one dose of IXCHIQ (batch number 24B011) on 07 Oct 2024.   Lipitor (atorvastatin) and Celexa (citalopram) were reported as concomitant drugs.   Relevant medical history included high cholersterol, depression and allergy to cats.  On 11 Oct 2024 he experienced myalgia. Five days after vaccination, on 12 Oct 2024, he experienced tachycardia, palpitations, aches, fever and weakness. His fever was ranging between 37.8 and 38.9 degree Celsius. His tachycardia was measured with 160 beats per minute on 13 Oct 2024 and the follwing day with 149 beats per minute. He was followed by a cardiologist and received IV medication and beta blocker to control tachycardia. Date of hospitalisatiohn was corrected to 17 Oct 2024.   The events tachycardia, palpitations, aches, fever and weakness resolved on 20 Oct 2024. The outcome of myalgia was unknown by time of report.; Sender's Comments: Causality assessed as possibly related as time to onset is plausible (hospitalisation due to symptoms 7 days after vaccination, presumably start of symptoms earlier) and as fever and cardiac symptoms, like in this case Tachycardia, Palpitations and Atrial flutter, are known for IXCHIQ, indicative of a systemic vaccination reaction. Confounding factors were not reported. Follow-up was initiated to receive at least vaccine identifiers, as this case is invalid at date of this initial report.  ---  First follow-up information received by two sources on 04 and 05 Nov 2024. Patient identifiers were reported, hence this case is now valid.  Myalgia, Aches and Weakness were additionally reported. Onset and end dates of events, medical history and concomitant medication were also reported. Day of hospitalisation was corrected by the reporting nurse via Questionnaire.  These new information do not change the previous assessment which remains possibly related, as time to onset is still plausible (start of events 4 days past vaccination), and as Fever, Myalgia, Pain, Asthenia, cardiac symptoms, like in this case Tachycardia, Palpitations and Atrial flutter, are known for IXCHIQ, indicative of a systemic vaccination reaction. Nevertheless, concomitant medication Citalopram and Atorvastatin should be taken into consideration, too.