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Chambers of the Heart

Chambers of the Heart

The human heart is a complex organ made up of four chambers: the right and left atria and the right and left ventricles. These internal chambers are separated by partitions known as the interatrial and interventricular septa. The exterior of the heart features a groove known as the coronary sulcus that demarcates the atria from the ventricles, while the anterior and posterior interventricular sulci distinguish between the two ventricles.
Deoxygenated blood from the body is received in the right...

Overview of the Heart

Overview of the Heart

The heart, a muscular organ located in the chest, functions as the body's pump, circulating blood through the vascular system. It has four chambers: two atria on top and two ventricles below. The right atrium receives deoxygenated blood from the body and passes it to the right ventricle, which pumps it to the lungs for oxygenation. The left atrium receives oxygenated blood from the lungs and transfers it to the left ventricle, which pumps it to the rest of the body.
The heart's structure...

Acute Respiratory Failure-II

Acute Respiratory Failure-II

Type I Respiratory Failure, or hypoxemic respiratory failure, occurs when the partial pressure of oxygen (PaO2) in arterial blood falls below 60 mmHg while breathing room air without a corresponding increase in arterial carbon dioxide levels (PaCO2). This condition highlights a significant impairment in the lungs' capacity to oxygenate the blood.
The underlying physiological abnormalities that contribute to hypoxemic respiratory failure include:

Pneumothorax-I

Pneumothorax-I

A pneumothorax is a condition where air builds up in the space between the lung and the chest wall, causing the lung to collapse. This condition arises when air enters the space between the parietal and visceral pleura, disrupting the negative pressure essential for lung inflation. This can lead to a partial or complete collapse of the lung.
Pneumothorax can be even further classified as spontaneous, traumatic, and tension pneumothorax.

Gross Anatomy of the Lungs

Gross Anatomy of the Lungs

The lungs are a pair of vital organs connected to the trachea via the left and right bronchi. The base of these organs meets the dome-shaped muscle known as the diaphragm. Encased by the pleurae, the lungs contact the mediastinum. The right lung is shorter yet wider, and has a larger volume than the left lung. The left lung has an indentation known as the cardiac notch. The superior region of the lungs is referred to as the apex, whereas the base is the lower region near the diaphragm. The...

Atelectasis II: Pathophysiology

Atelectasis II: Pathophysiology

Atelectasis develops when alveoli lose their air and collapse inward. Because lung tissue is naturally elastic, these air sacs shrink rather than remaining open. Collapsed alveoli are no longer ventilated, reducing their role in gas exchange. Blood flow may continue in these regions, creating a ventilation–perfusion mismatch. Clinical findings include decreased breath sounds, dullness to percussion, reduced chest expansion, and decreased tactile fremitus as sound transmission through collapsed...

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Related Experiment Video

Updated: May 20, 2026

Implantation of Total Artificial Heart in Congenital Heart Disease

Implantation of Total Artificial Heart in Congenital Heart Disease

Published on: July 18, 2014

An incomplete heart with incomplete lungs.

Can Y Karabay¹, Ahmet Guler, Soe M Aung

¹Cardiology Clinic, Koşuyolu Heart & Research Hospital, Istanbul, Turkey.

Echocardiography (Mount Kisco, N.Y.)

|July 4, 2012

Summary

This summary is machine-generated.

Congenital mitral valve hypoplasia is rare and can occur with other birth defects. This case highlights posterior mitral leaflet hypoplasia co-occurring with a congenital lung anomaly.

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Last Updated: May 20, 2026

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Area of Science:

Cardiology
Pediatric Cardiology
Congenital Heart Disease

Background:

Congenital hypoplasia or agenesis of the mitral valve is an exceedingly rare cardiac malformation.
It is often associated with other congenital anomalies, presenting complex clinical scenarios.

Observation:

This report details a specific case involving posterior mitral leaflet hypoplasia.
The condition was observed in conjunction with a congenital anomaly of the lungs.

Findings:

The case demonstrates the coexistence of mitral valve hypoplasia and congenital lung malformation.
This association underscores the potential for multi-system involvement in congenital defects.

Implications:

Understanding these rare associations is crucial for accurate diagnosis and management of congenital heart and lung conditions.
Further research into the embryological origins of these combined anomalies may improve clinical outcomes.