# Unveiling the Shadows: A Rare Encounter With Cardiac Tamponade Following Influenza B in a Young Female

## TL;DR

A young woman developed a rare heart complication called cardiac tamponade after an influenza B infection, highlighting the need for early detection and treatment.

## Contribution

This case report emphasizes the importance of recognizing rare cardiac complications of influenza B in otherwise healthy individuals.

## Key findings

- Influenza B can cause pericardial effusion and cardiac tamponade even in patients without major health issues.
- Early diagnosis using point-of-care ultrasound and echocardiography is crucial for managing this rare complication.
- Treatment with pericardial window and colchicine can effectively manage and prevent recurrence of tamponade.

## Abstract

Influenza B infection, although primarily recognized for respiratory symptoms, can lead to rare but severe cardiac complications such as pericardial effusion and cardiac tamponade. We present a case of a 33-year-old female with morbid obesity who initially exhibited flu-like symptoms, was subsequently diagnosed with influenza B infection, and was discharged with symptomatic treatment. Despite initial discharge, she returned with worsening weakness, gastrointestinal symptoms, and shortness of breath. Imaging studies confirmed pericardial effusion with early signs of tamponade, necessitating an emergent intervention. The patient underwent subxiphoid pericardial window and fluid removal, followed by colchicine treatment to prevent recurrence. Our case highlights the importance of recognizing and promptly managing rare influenza-related complications, particularly in patients without significant comorbidities. It underscores the value of a proactive approach, utilizing point-of-care ultrasound and echocardiography for early diagnosis and intervention to mitigate mortality and morbidity risks associated with pericarditis and cardiac tamponade secondary to influenza B.