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A newborn may appear stable in the hours after delivery. However, as the ductus arteriosus begins to close, an infant with an unrecognized interrupted aortic arch can deteriorate rapidly. Color changes, labored breathing, weak pulses, and poor perfusion may develop as blood flow to the lower body becomes compromised. Because this rare congenital heart defect can quickly become life-threatening, prompt recognition and treatment are critical.
The Becker Law Firm represents families in Cleveland medical malpractice and birth injury cases involving delayed or missed diagnosis of serious conditions. Call us at 216-480-4620 to speak with our team today.
Interrupted aortic arch (IAA) is a rare and serious congenital heart defect in which the aorta, the body's main artery responsible for carrying oxygenated blood from the heart to the rest of the body, is completely discontinuous. Unlike a narrowing or partial obstruction, an interruption means there is a complete gap in the aorta, preventing normal blood flow to the lower body entirely.
In a normal heart, the aorta carries oxygenated blood from the left ventricle through the aortic arch and then descends to supply the lower body. In an interrupted aortic arch, the continuity of that pathway is broken. The interruption is classified by location, with Type B interruptions being the most common and involving a break between the left carotid and left subclavian arteries. Without the normal aortic pathway, the lower body receives no direct oxygenated blood supply through normal circulation.
In fetal circulation, a vessel called the ductus arteriosus connects the pulmonary artery to the aorta, allowing blood to bypass the lungs before birth. After birth, the ductus normally closes within the first days of life as the lungs take over oxygenation.
In a newborn, the ductus arteriosus is essential for systemic blood flow until repair is performed. It is the primary pathway through which blood reaches the lower body. The infant's survival in those early hours and days depends entirely on this vessel remaining open.
Interrupted aortic arch belongs to a category of congenital heart defects called ductal-dependent lesions, meaning that survival in the newborn period depends on the ductus arteriosus remaining patent. The window between birth and ductal closure is the window within which diagnosis and intervention must occur.
While the ductus remains open, blood can bypass the interruption and reach the lower body. An infant with an undiagnosed interrupted aortic arch may appear relatively stable during this period, which is precisely what makes the condition so dangerous. The stability is temporary and entirely dependent on a vessel that is biologically programmed to close.
As the ductus begins to close, typically within the first 24 to 48 hours of life but sometimes extending several days, blood flow to the lower body diminishes and then stops. The infant's condition can deteriorate with terrifying speed. Metabolic acidosis develops as tissues are deprived of oxygenated blood. Organ systems begin to fail. Without immediate intervention, cardiovascular collapse and death may follow.
The speed of deterioration after ductal closure is one of the defining features of this condition and one of the reasons that delayed diagnosis is so catastrophic. An infant who appeared well at a morning assessment may be in shock by the afternoon. Every hour of delay after the ductus begins to close represents a narrowing window for successful intervention and an increasing risk of irreversible organ damage or death.
The symptoms of interrupted aortic arch as the ductus closes are recognizable to a trained and attentive provider, and they demand urgent evaluation rather than watchful waiting.
An infant who is feeding poorly, appears unusually lethargic, or has weak or absent pulses in the lower extremities is presenting warning signs that require immediate investigation. These symptoms are not always immediately attributed to a cardiac cause, which is one reason a diagnosis may be delayed. In the context of a newborn showing signs of hemodynamic compromise, congenital heart disease must be actively considered and evaluated.
Increased work of breathing, grunting, pallor, mottling, and poor peripheral perfusion are signs of a compromised circulatory state that, in a newborn, should prompt an urgent cardiac evaluation. By the time an infant is showing overt signs of circulatory collapse, the condition has most likely already become a life-threatening emergency.
A critical and diagnostically significant finding in an interrupted aortic arch is a difference in blood pressure or pulse quality between the upper and lower extremities. Because blood reaches the upper body through the normal aortic pathway but can only reach the lower body through the ductus, a discrepancy in perfusion between the arms and legs is a hallmark finding. Failure to recognize or assess for this discrepancy is a specific diagnostic error that has been central to malpractice claims in these cases.
With prompt recognition and treatment, survival rates for interrupted aortic arch approach 90% or higher at experienced pediatric cardiac centers. The medical knowledge and the tools to save these infants exist. What determines the outcome is whether providers recognize the condition in time to use them.
Routine pulse oximetry screening for critical congenital heart disease, now standard in newborn care, can detect oxygen saturation abnormalities that raise the suspicion of a ductal-dependent lesion. Echocardiography is the primary diagnostic tool for confirming interrupted aortic arch and can be performed at the bedside. When screening results are abnormal or when a newborn shows any signs consistent with hemodynamic compromise, urgent echocardiographic evaluation is required.
Some infants with interrupted aortic arch have associated cardiac defects, including ventricular septal defect and bicuspid aortic valve, that can complicate the clinical picture. Additional imaging, including CT angiography, may be required for complete anatomical characterization before surgical planning. The presence of associated defects does not reduce the urgency of diagnosis. It increases the complexity of the case and the importance of prompt expert pediatric cardiology involvement.
Interrupted aortic arch is missed for several recognizable reasons. The initial presentation may be nonspecific, with symptoms that could be attributed to sepsis, respiratory distress syndrome, or other neonatal conditions. The relative stability of the infant while the ductus remains open can create a false sense of security. Pulse oximetry may be normal in some presentations where the ductus is still widely patent and mixing of blood is occurring. Failure to assess for differences in upper and lower extremity perfusion removes one of the most important diagnostic clues from the clinical assessment.
When a newborn suffers because a serious heart defect was missed or ignored, the question is not just about what went wrong medically, but who is legally responsible.
At Becker Law Firm, we represent families in high-stakes medical malpractice cases involving missed or delayed diagnosis of congenital heart defects, including interrupted aortic arch. Our attorneys work with leading pediatric cardiology and neonatology experts to show how breakdowns in screening, evaluation, and escalation fall below the standard of care and directly cause preventable injury or death.
The standard of care in neonatal medicine requires that providers systematically assess newborns for signs of congenital heart disease, perform and correctly interpret pulse oximetry screening, recognize the clinical presentations that warrant urgent cardiac evaluation, and involve pediatric cardiology without delay when a ductal-dependent lesion is suspected. For a newborn showing signs of hemodynamic compromise, the obligation to investigate a cardiac cause is not optional. It is a part of appropriate neonatal care.
When a provider fails to recognize the warning signs of interrupted aortic arch, fails to initiate prostaglandin therapy to maintain ductal patency, or fails to obtain urgent echocardiography, the consequences are not merely unfortunate. They are the direct result of a failure to meet the standard of care that the medical community expects of providers caring for critically ill newborns. The harm that results may include brain injury from hypoxia, organ failure, and possible death.
Medical providers who fail to recognize the clinical presentation of a ductal-dependent congenital heart defect, who discharge a symptomatic newborn without adequate cardiac evaluation, or who delay initiating prostaglandins after a suspected ductal-dependent lesion is identified may face medical malpractice liability for the resulting harm. Liability may extend to individual physicians, nursing staff who failed to escalate abnormal findings, and the hospital system responsible for staffing, protocols, and the standard of care delivered within its walls.
A newborn whose condition is visibly changing, with worsening color, increasing work of breathing, or declining responsiveness, requires urgent reassessment and escalation. Failing to recognize or respond to signs of deterioration in a newborn during the period when ductal-dependent lesions present is a recognizable and preventable error.
Prostaglandin E1 is the medication that keeps the ductus arteriosus open and maintains circulation in a ductal-dependent lesion. When interrupted aortic arch is suspected, prostaglandin therapy should be initiated immediately while confirmation is pending because the consequences of delay can be severe, and the medication is safe to administer while evaluation proceeds. Waiting for echocardiographic confirmation before starting prostaglandins when clinical suspicion is high may be inconsistent with accepted practice.
Ordering echocardiography when clinical findings suggest a congenital cardiac defect is a basic obligation of neonatal care. Failure to order the appropriate imaging, or failure to correctly interpret abnormal findings when imaging is obtained, are both forms of diagnostic error that can delay life-saving treatment.
Discharging a newborn who is showing signs of hemodynamic compromise without adequate cardiac evaluation is among the most serious errors that can occur in this context. Infants with undiagnosed interrupted aortic arch who are discharged from the hospital may deteriorate catastrophically at home without any access to emergency intervention.
The Becker Law Firm approaches birth injury and cardiology malpractice cases involving conditions like interrupted aortic arch with the medical and legal depth these complex matters require.
Every investigation begins with a thorough review of prenatal records, delivery records, newborn screening results, and NICU documentation to establish a complete timeline of the infant's clinical course and the providers' responses at each stage. We work with qualified pediatric cardiology experts who can evaluate whether the standard of care was met at every decision point and articulate clearly where the failures occurred and what the consequences were.
Our goal in every case is to identify not just what went wrong, but why, and to pursue full accountability for families whose children suffered preventable harm when a time-sensitive condition was not recognized in time.
If your newborn suffered serious harm or did not survive because of a delayed or missed diagnosis of interrupted aortic arch or another congenital heart defect, the Becker Law Firm is ready to evaluate your case. Contact us at 216-480-4620 today to speak with a Cleveland medical malpractice attorney.
